2012

Cover image of the 45th Conference Proceedings: Three black-and-white cows lounge in a spring field. Yellow background.

Proceedings of the Forty-Fifth Annual Conference. American Association of Bovine Practitioners. September 20-22, 2012. Montreal, Canada.

Editor: Robert A. Smith
Executive Vice President: M. Gatz Riddell, Jr.
Advertising Representative: J. T. O'Brien & Assoc.
Publisher: VM Publishing Company

Published: 2012-09-20

Front / Back Matter

General Sessions

  • Grumpy old vets revisited

    Ken Nordlund
    1-4
    DOI: https://doi.org/10.21423/aabppro20123861

  • Adapting beef practice to future realities

    G. Kee Jim
    7-10
    DOI: https://doi.org/10.21423/aabppro20123862

  • The buyer's point of view about animal welfare what milk purchasers are looking for

    Jennifer B. Walker
    11-12
    DOI: https://doi.org/10.21423/aabppro20123863

  • Dairy stockmanship Reconnecting the people with the cows

    Paul Rapnicki, Margaret Perala, Don Höglund
    13-19
    DOI: https://doi.org/10.21423/aabppro20123864

  • Fee structure models in dairy practice

    Mark J. Thomas
    20-21
    DOI: https://doi.org/10.21423/aabppro20123865

  • Beef practice models

    Murray D. Jelinski
    22-25
    DOI: https://doi.org/10.21423/aabppro20123866

  • Veterinary technicians The case for their employment in bovine practice

    Sarah Wagner
    26
    DOI: https://doi.org/10.21423/aabppro20123867

  • The Summer Dairy Institute Advanced training for young dairy veterinarians

    Charles W. Nydam, Daryl V. Nydam, Charles L. Guard, Robert O. Gilbert, Steve Eicker
    28-35
    DOI: https://doi.org/10.21423/aabppro20123868

Beef Sessions

  • Integrated program for reducing bovine respiratory disease complex in beef and dairy cattle coordinated agricultural project (BRD CAP)

    Alison L. Van Eenennaam
    36-39
    DOI: https://doi.org/10.21423/aabppro20123869

  • What's new in timed artificial insemination and assisted reproduction in beef cattle?

    Reuben J. Mapletoft, Gabriel A. Bó
    40-48
    DOI: https://doi.org/10.21423/aabppro20123870

  • Case-based studies of infertility in bulls

    A. D. Barth
    50-59
    DOI: https://doi.org/10.21423/aabppro20123871

  • The potential value of DNA-based tests for host bovine respiratory disease resistance to the beef cattle industry

    Alison L. Van Eenennaam
    60-64
    DOI: https://doi.org/10.21423/aabppro20123872

  • A beef producer's view of the role of bovine practitioner

    J. P. Rhea
    66-68
    DOI: https://doi.org/10.21423/aabppro20123873

  • Past, present, and future rural veterinarian

    Murray D. Jelinski
    69-72
    DOI: https://doi.org/10.21423/aabppro20123874

  • Cattle market update What we need to know

    Anne Dunford
    73-75
    DOI: https://doi.org/10.21423/aabppro20123875

  • Using mixed treatment comparison meta-analysis to compare interventions in bovine practice

    Annette M. O'Connor
    76-81
    DOI: https://doi.org/10.21423/aabppro20123876

Dairy Sessions

  • Why cows die on dairies

    Franklyn Garry, Craig McConnel
    82-86
    DOI: https://doi.org/10.21423/aabppro20123877

  • Mortality in different management systems

    Chad D. Dechow, Robert C. Goodling
    88-91
    DOI: https://doi.org/10.21423/aabppro20123878

  • The behavioral and physiological consequences of overstocking dairy cattle

    Julie M. Huzzey, Marina A. G. von Keyserlingk, Thomas R. Overton
    92-97
    DOI: https://doi.org/10.21423/aabppro20123879

  • Managing high-risk fresh cows

    Garrett R. Oetzel
    98-104
    DOI: https://doi.org/10.21423/aabppro20123880

  • The importance of dairy herd health provision and data management, with a focus on mastitis control

    Martin Green, Andrew Bradley, Chris Hudson, James Breen, Jonathan Statham, Jon Huxley
    105-109
    DOI: https://doi.org/10.21423/aabppro20123881

  • Drug usage hazard analysis and critical control points (HACCP)

    David A. Rhoda
    110-113
    DOI: https://doi.org/10.21423/aabppro20123882

  • Parlor performance basics

    David A. Reid
    114-115
    DOI: https://doi.org/10.21423/aabppro20123883

  • Reproductive tract infection and inflammation in dairy cows

    Stephen LeBlanc
    116-122
    DOI: https://doi.org/10.21423/aabppro20123884

  • Estrous detection and timed AI protocols complementary not mutually exclusive

    Ricardo Chebel
    123-128
    DOI: https://doi.org/10.21423/aabppro20123885

AABP & AASRP Sessions

  • Diagnosis and control of small ruminant abortion

    Paula I. Menzies
    129-137
    DOI: https://doi.org/10.21423/aabppro20123886

  • Q fever update

    Paula I. Menzies
    138-141
    DOI: https://doi.org/10.21423/aabppro20123887

  • Pregnancy toxemia and metabolic changes of transition in small ruminants

    Robert J. Van Saun
    142-147
    DOI: https://doi.org/10.21423/aabppro20123888

  • Selenium nutrition and therapy in small ruminants

    Robert J. Van Saun
    148-154
    DOI: https://doi.org/10.21423/aabppro20123889

  • Understanding copper nutrition in small ruminants

    Robert J. Van Saun
    155-160
    DOI: https://doi.org/10.21423/aabppro20123890

  • Johne's disease in sheep and goats

    Paula I. Menzies
    161-169
    DOI: https://doi.org/10.21423/aabppro20123891

Student Sessions

  • Difficult conversations with clients

    Glennon Mays
    170-174
    DOI: https://doi.org/10.21423/aabppro20123892

  • Difficult conversations with colleagues and staff

    Keith E. Sterner
    175-177
    DOI: https://doi.org/10.21423/aabppro20123894

Research Summaries 1

  • Evaluation of environmental culture to determine herd status for Johne's disease on Atlantic Canadian dairy farms

    C. J. Lavers, G. P. Keefe, S. L. M. McKenna, I. R. Dohoo, M. Chaffer
    178
    DOI: https://doi.org/10.21423/aabppro20123895

  • Evaluation of the milk ELISA to determine herd status for Johne's Disease

    C. J. Lavers, G. P. Keefe, S. L. M. McKenna, I. R. Dohoo, M. Chaffer
    179-180
    DOI: https://doi.org/10.21423/aabppro20123896

  • Effect of season and lactation stage on the diagnostic sensitivity of direct real-time PCR assay for detection of fecal shedding of Mycobacterium avium subsp paratuberculosis

    E. Laurin, G. Keefe, S. McKenna, M. Chaffer
    181
    DOI: https://doi.org/10.21423/aabppro20123897

  • Preliminary program outcomes from the Atlantic Johne's Disease Initiative

    Karen MacDonald-Phillips, Greg Keefe, Shawn McKenna
    182
    DOI: https://doi.org/10.21423/aabppro20123898

  • Intramammary infection at calving following Petrifilm-based selective dry cow therapy

    M. Cameron, G. Keefe, J. P. Roy, K. MacDonald
    183
    DOI: https://doi.org/10.21423/aabppro20123899

  • Preliminary results from a non-inferiority clinical trial evaluating the efficacy of three commercial dry cow mastitis preparations

    A. G. Arruda, S. Godden, P. Rapnicki, P. Gorden, L. Timms, S. Aly, T. Lehenbauer, J. Champagne
    184
    DOI: https://doi.org/10.21423/aabppro20123900

  • Risk factors for Prototheca mastitis on Ontario dairy farms

    Laura Pieper, Ann Godkin, David Kelton
    185
    DOI: https://doi.org/10.21423/aabppro20123901

  • Understanding and controlling variability of iodine concentration in bulk-tank milk in Canada

    K. MacDonald, G. Keefe, J. Sanchez, J. P. Roy, D. Kelton, S. Hendrick
    186-187
    DOI: https://doi.org/10.21423/aabppro20123902

  • Evaluation of a Petrifilm-based on-farm culture system for the detection of intramammary infections in cows with low somatic cell counts at dryoff

    M. Cameron, G. Keefe, J. P. Roy, K. MacDonald
    187-188
    DOI: https://doi.org/10.21423/aabppro20123903

  • The association between β-hydroxybutyrate concentration at diagnosis of left displaced abomasum in dairy cows and removal from the herd postsurgical correction

    William Croushore, Paula Opsina, David Welch, Daniel Zawisza, Daryl Nydam
    189
    DOI: https://doi.org/10.21423/aabppro20123904

  • Profitability of preconditioning lessons learned from an 11-year case study of an Indiana beef herd

    W. Mark Hilton, Nicole J. Olynk
    190
    DOI: https://doi.org/10.21423/aabppro20123905

  • Comparison of 5-day versus 7-day CIDR CO-Synch protocol in crossbred commercial beef cows

    S. C. Holland, D. W. Whittier, S. G. Clark, J. F. Currin, H. H. Schramm, R. K. Kasimanickam
    191
    DOI: https://doi.org/10.21423/aabppro20123906

  • Isolation of Mycobacterium avium ssp paratuberculosis from the saliva of cattle a pilot study

    U. S. Sorge, S. Kurnick, S. Sreevatsan
    192
    DOI: https://doi.org/10.21423/aabppro20123907

  • Efficiency of a genetic test to detect benzimidazole-resistant Haemonchus contortus nematodes on sheep farms in Quebec

    V. Barrere, R. K. Prichard
    193-194
    DOI: https://doi.org/10.21423/aabppro20123908

Research Summaries 2

  • Milk flow obstruction caused by varicose veins in the teats in dairy cattle 22 cases

    H. Lardé, S. Nichols, A. Desrochers, M. Babkine, D. Francoz, P. Y. Mulon
    195-196
    DOI: https://doi.org/10.21423/aabppro20123909

  • Digital dermatitis a description of lesion progression and regression of natural disease in Holstein dairy cattle over two years

    A. Krull, P. Gorden, J. Shearer, B. Leuschen, P. Plummer
    197
    DOI: https://doi.org/10.21423/aabppro20123910

  • Pharmacokinetics and milk elimination of flunixin meglumine in dairy cattle following different routes of administration

    L. Kissell, G. W. Smith, T. L. Leavens, R. E. Baynes, J. E. Riviere
    198
    DOI: https://doi.org/10.21423/aabppro20123911

  • Temporal changes in antimicrobial resistance of fecal coliforms isolated from dairy cows

    E. M. Corbett, B. Norby, L. W. Halbert
    199
    DOI: https://doi.org/10.21423/aabppro20123912

  • Reproductive performance with an automated activity monitoring system versus a synchronized breeding program

    Rafael C. Neves, Steven J. LeBlanc
    200
    DOI: https://doi.org/10.21423/aabppro20123913

  • Detection of hyperketonemia in dairy cows "in-lab" milk components performance

    J. Denis-Robichaud, J. Dubuc, D. Lefebvre, L. DesCôteaux
    201-202
    DOI: https://doi.org/10.21423/aabppro20123914

  • Comparison of crossbred and purebred Holstein cows during the transition period

    L. G. D. Mendonça, N. B. Litherland, M. A. Ballou, R. C. Chebel
    203-204
    DOI: https://doi.org/10.21423/aabppro20123915

  • Efficacy of a combination butaphosphan-cyanocobalamin product and insulin for the treatment of ketosis in lactating dairy cattle

    J. L. Gordon, T. F. Duffield, T. Herdt, L. Neuder, D. F. Kelton, S. J. LeBlanc
    205
    DOI: https://doi.org/10.21423/aabppro20123916

  • Comparison of serum concentrations and duration of BVDV 1, BVDV 2, BHV-1, BRSV, and PI3 virus-neutralizing antibodies in calves fed maternal colostrum or a colostrum replacer at birth

    M. F. Chamorro, P. H. Walz, D. M. Haines, T. Passler, T. Earleywine, M. D. Givens
    206
    DOI: https://doi.org/10.21423/aabppro20123917

  • A randomized clinical trial to evaluate the effect of oral zinc supplementation as a treatment for diarrhea in neonatal Holstein calves

    A. D. Glover, B. Puschner, H. A. Rossow, J. D. Champagne, P. C. Blanchard, T. W. Lehenbauer, S. S. Aly
    207-208
    DOI: https://doi.org/10.21423/aabppro20123918

  • Health care metrics and health care policies during the preweaned period on calf ranches

    W. L. Walker, W. B. Epperson, T. E. Wittum, L. K. Lord, P. J. Rajala-Schultz, J. L. Lakritz
    209
    DOI: https://doi.org/10.21423/aabppro20123919

  • Otitis media and interna in dairy calves a retrospective study of 29 cases

    V. Bernier Gosselin, G. Fecteau, D. Francoz, A. Desrochers, S. Nichols, M. Babkine
    210
    DOI: https://doi.org/10.21423/aabppro20123920

  • Ultrasound evaluation of tympanic bulla in calves

    V. Bernier Gosselin, M. Babkine, S. Nichols, A. Desrochers
    211
    DOI: https://doi.org/10.21423/aabppro20123921

Research Summaries 3

  • Use of neurostimulation to localize and anesthetize the brachial plexus of calves undergoing metacarpal surgery

    H. Lardé, S. Nichols, A. Desrochers, G. Bussières, M. Kopal
    212-213
    DOI: https://doi.org/10.21423/aabppro20123922

  • Surgery of the bovine rumen indications and factors relating to outcomes in cattle in Ohio and Kansas

    A. K. Hartnack, M. R. Rousseau, A. J. Niehaus, D. E. Anderson
    214
    DOI: https://doi.org/10.21423/aabppro20123923

  • An evaluation of the prevalence of BHV-1 abortions based on diagnostic submissions to five U.S. veterinary diagnostic laboratories

    S. Gould, A. M. O'Connor, V. Cooper
    215
    DOI: https://doi.org/10.21423/aabppro20123924

  • Real-time PCR assay for trichomonosis on pooled direct preputial samples

    A. Garcia Guerra, J. E. Hill, J. Campbell, C. Waldner, S. Hendrick
    216
    DOI: https://doi.org/10.21423/aabppro20123925

  • Clinical sensitivity and specificity of a quantitative PCR assay for bovine genital campylobacteriosis in bulls

    A. Garcia Guerra, B. Chaban, J. E. Hill, C. Waldner, S. Hendrick
    217
    DOI: https://doi.org/10.21423/aabppro20123926

  • Bovine coronaviruses from the respiratory tract antigenic and genetic diversity

    R. W. Fulton, J. F. Ridpath, L. J. Burge
    218
    DOI: https://doi.org/10.21423/aabppro20123927

  • A survey of herd-level risk factors for bovine respiratory disease (BRD) in nursing beef calves

    A. R. Woolums, R. D. Berghaus, D. R. Smith, B. J. White, T. J. Engelken, M. Irsik, D. K. Matlik, A. L. Jones, R. W. Ellis, L. J. Smith, G. L. Mason, E. R. Waggoner
    219
    DOI: https://doi.org/10.21423/aabppro20123928

  • Immune, health, and growth responses of beef calves administered modified-live virus respiratory vaccine in the presence of maternal antibody versus a traditional vaccination regimen

    J. G. Powell, J. T. Richeson, E. B. Kegley, K. P. Coffey, G. F. Erf, D. T. Ensley
    220
    DOI: https://doi.org/10.21423/aabppro20123929

  • A survey to evaluate anthelmintic resistance of gastrointestinal stongyles in Iowa cow/calf operations

    T. J. Engelken, M. J. Kimber, T. A. Day, S. S. Ubben, A. O'Connor, L. R. Ballweber, P. K. Evans, R. D. Dewell, C. Wang
    221
    DOI: https://doi.org/10.21423/aabppro20123930

  • Biosecurity practices of midwestern veterinarians in food animal and mixed animal practices

    T. J. Engelken, D. Bickett-Weddle, C. Wang
    222
    DOI: https://doi.org/10.21423/aabppro20123931

  • The use of homeopathic remedies for the treatment of calves with diarrhea

    E. M. Boldyreva
    223
    DOI: https://doi.org/10.21423/aabppro20123932

  • Effect of demographic trends in livestock inventory and number of operations on food animal veterinary practices in the United States

    G. M. Schuenemann, W. P. Shulaw
    224
    DOI: https://doi.org/10.21423/aabppro20123933

  • Results of anti-mortem screening methodology to predict prescribed drug withholding periods for flunixin and ceftiofur in heifers

    R. Salter, S. Jones, J. Wells, D. Griffin, K. Shuck, T. Goldsmith, P. Rapnicky
    225-226
    DOI: https://doi.org/10.21423/aabppro20123934

  • Identification and antimicrobial resistance of Bibersteinia trehalosi

    G. A. Dewell, C. Thompson, P. J. Plummer, T. Frana, R. D. Dewell, G. J. Phillips
    227
    DOI: https://doi.org/10.21423/aabppro20123935

Research Summaries 4

  • Feeding heat-treated colostrum reduces morbidity in preweaned dairy calves

    S. M. Godden, D. J. Smolenski, M. Donahue, J. M. Oakes, S. Wells, J. Fedrow
    228
    DOI: https://doi.org/10.21423/aabppro20123936

  • Effect of heat-treatment on nutritional and immune factors in bovine colostrum

    S. M. Godden, K. Hausler, N. Koewler, K. Brakefield, M. Van Amburgh, P. Rapnicki
    229
    DOI: https://doi.org/10.21423/aabppro20123937

  • Evaluation of serum immunoglobulin G concentrations in dairy calves by use of an automated turbidimetric immunoassay

    M. L. Alley, D. M. Haines, G. W. Smith
    230
    DOI: https://doi.org/10.21423/aabppro20123939

  • Influence of season, ambient temperature, and time until feeding on bacteria counts in pasteurized milk for dairy calves

    D. J. Wilson, G. M. Goodell, T. Kelly
    231
    DOI: https://doi.org/10.21423/aabppro20123940

  • Evaluation of the surface area of P3 in dairy calves following changes in management systems

    J. A. Gard, D. R. Wilhite, D. C. Taylor, S. P. Rodning, M. Edmondson, K. Sanders
    232
    DOI: https://doi.org/10.21423/aabppro20123941

  • Effect of housing type on health of preweaned dairy calves during summer in Florida

    G. Peña, E. Kunihiro, M. J. Thatcher, C. Risco
    233
    DOI: https://doi.org/10.21423/aabppro20123942

  • It doesn't take longer to keep good health records on dairies

    S. K. Giebel, J. R. Wenz, S. A. Poisson, D. A. Moore, C. S. Schneider
    234
    DOI: https://doi.org/10.21423/aabppro20123943

  • Measuring a milk response lactation models add power

    J. L. Ehrlich, J. B. Cole, D. Null
    235
    DOI: https://doi.org/10.21423/aabppro20123945

  • Randomized clinical trial to compare the efficacy of two different antimicrobials on cure, milk production, and reproductive performance of dairy cows diagnosed with metritis

    D. A. Moore, M. W. Overton, W. M. Sischo
    236
    DOI: https://doi.org/10.21423/aabppro20123946

  • Peripartum haptoglobinemia identifies dairy cows at risk for retained placenta and metritis

    J. Dubuc, M. A. G. von Keyserlingk, S. J. LeBlanc
    237
    DOI: https://doi.org/10.21423/aabppro20123948

  • The coefficient of determination between NEFA and BHBA and the association between their ratio and the development of disease in healthy cows sampled during the post-partum period

    P. A. Ospina, D. V. Nydam, T. Stokol, T. R. Overton
    238-239
    DOI: https://doi.org/10.21423/aabppro20123949

  • Effects of prepartum grouping strategy on immune, metabolic, health, reproductive, and productive parameters of dairy cows

    P. R. B. Silva, J. G. N. Moraes, L. G. D. Mendonça, A. A. Scanavez, M. I. Endres, R. C. Chebel
    240
    DOI: https://doi.org/10.21423/aabppro20123950

  • Types and frequencies of movements onto and off of Vermont dairy farms

    J. M. Smith
    254
    DOI: https://doi.org/10.21423/aabppro20123963

Posters

  • Effect of dietary selenium sources on selenium and glutathione peroxidase concentrations and immune function in beef cattle

    Noureddine Jinane, Younes Chorfi, Yvon Couture, Alain Fournier
    241
    DOI: https://doi.org/10.21423/aabppro20123951

  • Hawaii beef producer animal health and welfare certification training and impact evaluation

    C. Sakamoto, H. Zaleski, J. Dobbs, E. Yoshioka, G. Graef, A. Stokes
    242
    DOI: https://doi.org/10.21423/aabppro20123952

  • Impact of Component® TE-G with Tylan® on performance of stocker calves

    G. L. Denney, S. P. Rodning, D. L. Rankins, J. A. Gard
    243
    DOI: https://doi.org/10.21423/aabppro20123953

  • Utilization of a 5- or 14-day progestin-based estrous synchronization protocol with sorted semen in beef heifers

    J. G. Powell, T. D. Lester, J. L. Reynolds, A. J. Davis, J. A. Hornsby, R. W. Rorie
    244
    DOI: https://doi.org/10.21423/aabppro20123954

  • Estrous response for progestin-based estrous synchronization protocols and subsequent pregnancy rates when using sorted semen in primiparous and multiparous beef cows

    J. G. Powell, T. D. Lester, A. J. Davis, B. R. Lindsey, R. W. Shofner, R. W. Rorie
    245
    DOI: https://doi.org/10.21423/aabppro20123955

  • Performance of feedlot Nellore cattle fed with rations containing different corn genotypes

    G. E. Cunha, I. Y. Mizubuti, B. B. Sestari, R. C. Gomes, E. S. Pereira, E. L. A. Ribeiro
    246
    DOI: https://doi.org/10.21423/aabppro20123956

  • Liver tolerance as a mechanism for the development of BVDV persistent infection

    S. E. Morarie, N. P. Smirnova, T. R. Hansen, J. Mediger, L. Braun, C. C. L. Chase
    247
    DOI: https://doi.org/10.21423/aabppro20123957

  • Outcome of a bovine viral diarrhea virus infection in a South Dakota herd including reproductive losses, persistent infection, and mortality data from PI animals

    S. E. Morarie, L . J. Braun, L. D. Holler
    248
    DOI: https://doi.org/10.21423/aabppro20123958

  • Bovine mastitis prevalence and associated risk factors in dairy cows in Nyagatare District, Rwanda

    Iraguha Blaise, Mushonga Borden, Hamudukwanda Humphrey
    249
    DOI: https://doi.org/10.21423/aabppro20123959

  • Critical success factors transitioning from conventional to automatic milking in the United States

    Ben Smink, Peter Kool, Rik van der Tol
    250-251
    DOI: https://doi.org/10.21423/aabppro20123960

  • New technology for milking vacuum diagnostics helps veterinarians better understand udder health problems

    K. Detrick, E. M. Postma
    252
    DOI: https://doi.org/10.21423/aabppro20123961

  • On-farm study of mastitis-associated bacteria recovered from five bedding materials

    Greg Keefe, Omid Nekouei, Ian Dohoo, Don Anderson, Jenny Yu
    253
    DOI: https://doi.org/10.21423/aabppro20123962

  • The use of homeopathic remedies in the treatment of cows with mastitis

    E. M. Boldyreva
    255
    DOI: https://doi.org/10.21423/aabppro20123964

  • Performance of calves fed fresh colostrum from their dams, compared with that of calves fed colostrum from cows other than their dams

    G. A. Donovan, L. J. Sims, K. Fisk, W. Sapp, P. Pinedo
    256-257
    DOI: https://doi.org/10.21423/aabppro20123965

  • An evaluation of the preventative and curative properties of 3 foot bath products used to control digital dermatitis

    G. Cramer, M. Lopez Benavides
    258
    DOI: https://doi.org/10.21423/aabppro20123966

  • Effect of manual rupture of ovarian cysts on reproductive parameters in dairy cattle

    A. Villarroel, B. J. Krahn
    259
    DOI: https://doi.org/10.21423/aabppro20123967

  • IDEXX Milk Pregnancy Test a new tool for pregnancy diagnosis in cattle

    K. Velek, J. Lawrence, C. Egli, H. Pearse, R. Hildreth
    260
    DOI: https://doi.org/10.21423/aabppro20123968

  • Lymphatic vessel puncture of the bovine udder feasibility for sample collection and detection of Mycobacterium avium subsp paratuberculosis in the lymphatic fluid by PCR

    D. Owen Rae, Johannes L. Khol, Pablo J. Pinedo, Laura M. Neumann, Claus D. Buergelt, Walter Baumgartener
    261
    DOI: https://doi.org/10.21423/aabppro20123969

  • The association between blood β-hydroxybutyric acid in postparturient dairy cows and the incidence of clinical diseases, milk yield, milk components, reproduction, and culling during early lactation

    Alfonso Lago, José Manuel Valle, José Antonio Pico, Cándido Rodríguez, Manuel Morales, Alfonso Goris
    262-263
    DOI: https://doi.org/10.21423/aabppro20123970

  • Seasonal variation in milk production and culling in California dairy herds

    Noelia Silva-del-Río, Alfonso Lago, Bill VerBoort, John Beaulieu
    264
    DOI: https://doi.org/10.21423/aabppro20123971

  • Effect of progesterone concentration at and during ovsynch protocol on conception rate in dairy cows

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