Great question – it depends on how much we changed their genetics through selective breeding. So, an alsatian hasn’t had it’s genetics changes as much as a chihuahua has which would let the alsatian behave more like a wolf if we let it become feral. I don’t think the chihuahua would last very long! Cats haven’t been domesticated to the same extent that dogs have and they become feral quite easily again. The same for horses too.