How old are puppies when they start to play?
Puppies start to play when they are about 3-4 weeks old.
Your 6 mo old puppy keeps running over 3 month old puppies they don't yelp but the owners get upset and think he's aggressive he has shown no other signs of aggression?
It isn't aggression. It's a six month old acting like a normal six month old. A six month old puppy is too big to play with three month old puppies. He's going to mow down the other puppies and it doesn't mean there is a thing wrong with him. He's just bigger, stronger, more coordinated, and more confident than puppies half his age. Choose play mates for him that are of a similar age, similar…