Wolves don't seem to mind eating deer though. In fact, a good part of the animal kingdom actually dedicates itself to hunting down and eating the other part for which meat holds little appeal.
Treating animals badly is to be frowned upon, sure. While they live, they should have a chance to be reasonably content. I will not, however, go on a guilt trip about promoting the killing of animals so I can sustain myself by eating meat. As long as the killing is not wasteful, outright cruel and that the product obtained is not wasted; I consider it acceptable.
I don't eat cats and dogs, though. No wish to either, unless it would be a desperate mean of survival (which would probably include cannibalism of recently dead bodies from injury - the dead person doesn't need the muscle mass anymore and if I wouldn't eat it, it'd go to carrion or scavengers).