Obedience cannot be translate as tameness
Our 2 chow chows obey all my command without fail. However it seems their brains shut down when they see cats, squirrels and all feather fowls, they will chase after them and will not obey any command to stop. This hardwired part of their instinct makes me realised that chow chow being a hunting breed cannot be tamed. They might be very obedience and docile, but once they encounter small animals their hunting instinct takes over.
However this attack instinct does not apply to small dogs or puppy. Our dogs are very friendly to small dogs and puppies. It looks like smell plays a part in their brain to differentiate between same breed and prey.