In my opinion, the amount of time, effort and resources required to tame an animal whilst in a zombie apocalypse would not be worth it. Time and effort would be better spent scavenging, keeping look out or maintaining safe houses. The reason why cats and dogs are such popular pets is because they've had a 12,000 to 14,000 year head start in being domesticated. Every other animal on your list, people have trained them but in isolated incidents, few and far between, requiring attention at all times. Everyday would be a fight for survival so there's no way I'd be using precious food on an animal the size of a bear. Half a bowl of cat/dog food a day I could handle (Dogfood is already implemented after all) but keeping a bear fed enough to not want to eat me, preposterous. If you have that much food in single player, I'd think about increasing your difficulty settings. If you're looting a house and come across a dog or a cat, I wouldn't have a problem with being able to take that home as your own. Whilst I think it would be cool including other wildlife to hunt, taming larger animals would just be unrealistic when society is crumbling all around you.