[SonnyRott]

Your 14 week old puppy just had an imprint....a very negative one.

This is the time to make sure that everything in your pup's world is positive and secure. That window of opportunity will close very shortly.

Socializing your dog is important but make sure the dogs you socialize with are gentle and more your pups size. A 150 lb Rott would surely scare the cr**p out of a 6 month old pup if attacked.

I would keep the introductions coming but with smaller, friendly, age appropriate puppies.