[brimble]

I'd think dogs are mostly able to because they're still around humans and can scavenge off our garbage. Any breed that's not damn close to a wolf, I'd expect not to be able to find/catch enough food to survive long if dropped in actual wilderness.

Chickens would become food for other animals in days, at most. It's hard enough to keep that from happening when they're kept, let alone in the wild.

Cows are like giant, extremely stupid deer, so I doubt we'd tolerate them in the wild anywhere even slightly near civilization, putting aside their ability to survive on their own (which I also doubt—first bad Winter would take care of them, I reckon).