How To Tell If You Have An Aggressive Puppy. A healthy and psychologically sound puppy should be naïve and at least somewhat eager to interact with people and animals. Puppies play with each other through mouthing and biting.

How to stop puppy aggression. To begin with, some large dogs, such as collies tend to have smaller feet as compared to other dogs their size. The most common puppy behavior falsely viewed as aggressive is mouthing and biting.
It’s very common to see puppies that have an overly rough play style, low bite inhibition, low frustration tolerance, or even mild resource guarding issues.
You might just be able to go to another part of the park with different dogs, but if the behavior continues, leave and come back another day. How to stop a puppy from being aggressive. Teach your pup that biting isn’t a good thing by using distraction techniques. Puppies play with each other through mouthing and biting.