I ask because I have had dogs that would hit any dog big or small. Some that if a dog came close to me they would hit whoever big or small. One now only goes after this pup that is three or four months younger than him. He gets along with older dogs. When the pup runs he goes after him like lion on gazelle.

I have seen males hate males like challenge. This is more like wolves on a rabbit. Isn't prey drive a different thing.