A buddy of mine was in the Peace Corps in his youth and spent some time in some African country or other, building wells and irrigation. One village they were helping was going to cook a pig. Somehow he got elected to help the pig on its journey to the afterlife. He smacked it over the head, stunning it, and was over it with a knife, just about to bleed it out when it decided that dinner was not going to fit its schedule after all, and made a break for it. This ruined the cut my friend was trying to make. It was bleeding a little, but not nearly enough. All it really did was make it harder to hang onto. He didn't want to let go of it because they had no corral. They were only a few feet from a pond, so he dragged it in to try to drown it. The pig was having none of this, and kept thrashing around and squealing like - well you know. The pond was very shallow for the first few yards, which made it just about impossible to keep the pig's head under water. The villagers weren't much help either - they just stood there staring in awe like "look at that crazy white boy". Eventually, the pig worked its way back to dry land, and my friend was barely hanging onto a leg when one of his fellow Peace Corps volunteers ran up and capped the thing in the head, finally bringing the impromptu wrestling exhibition to a close.
"Why the heck didn't you tell me you had a gun?"
"I didn't tell anybody I had a gun."
How does this help you with your question? Do not wrestle the cow. Just shoot it.