Robbins, J.A. , Williams, R., Derscheid, R.J. , Boyum, B. and Spangler, C. 2021. Comparison of frontal-sinus and poll shot locations as secondary methods for euthanizing dairy cattle with a penetrating captive bolt gun. The Bovine Practitioner. 55, 2 (Dec. 2021), 115–119. DOI:https://doi.org/10.21423/bovine-vol55no2p115-119.