[PoppyKenna]

Has he ever met a puppy before? He could be confused by this little dog-like thing, and that could be making his interactions come across worse.

I'd continue to separate, but if they're okay being within eyesight of each other, let them.

 

[PoppyKenna]

If it makes you feel any better, I actually had the exact same problem when I brought Chisum home - but reversed. My current dogs were very welcoming of this new little creature...Chisum, not so much. He growled and even tried to attack the other dogs, which I frankly wasn't expecting from an 8 week old puppy.

He slowly got more confident and used to the other dogs. He's even not so bad with strange dogs. It was just a change, I think.

I think if you take it slowly, they'll learn to get along. If nothing else, they'll learn to comfortably avoid each other.

You're very aware, knowledgeable, and diligent so I really think it will be just fine.