They aren't killing for sport, they're killing to make a living.
I think it's OK to get upset over "stuff". On the 23rd I saw two foxes while taking my sister home. On the 24th, I saw two small reddish down bodies dead in the road just a block from where I saw the foxes.
I was o upset while taking her home and coming back. I hate to stop and get them out of the road. They were in the shoulder, but I wanted to get them in the grass where they wouldn't get hurt more by cars, which is stupid, because they're dead, how can they get hurt MORE, but that was what I was thinking and how I was feeling.
It wasn't the foxes though, it was two puggles, which somehow made it better and worse at the same time.
So I know how you feel. Even if it's a cow. Even if it's an opossum, or a chicken, or a wild boar for that matter.