I have a new dog who is slowing becoming more aggressive towards other dogs.?

I just got the dog about 4 weeks ago and he's been wonderful. He's a Pit mixed with mastiff and shepard. He's very smart and very nice towards people and most dogs, but just recently he has become a little bit of a bully at the dog park. He does have the dominant personality which i've known about but it has never come out like it did today. There wasn't any biting just rough play and growling. And tips?I have a new dog who is slowing becoming more aggressive towards other dogs.?
Tip- don't take him to the dog park. It's sheer bedlam there and not appropriate for a dog displaying those behaviors. Try a doggy daycare situation instead where the dogs are supervised by people trained to recognize negative behaviors and nip them in the bud.I have a new dog who is slowing becoming more aggressive towards other dogs.?
Some breeds have a naturally rough way of playing. My Siberian Husky is the same way, and so is the Rott-Lab mix our friends have. If his ruff is down, his tail is wagging, he doesn't appear to be looking down on other dogs, and the other dogs don't seem to be bothered, this is perfectly fine.

However, if none of the above are true and he displays truly aggressive behavior, training is required. Reprimand him for his actions and remove him from the situation until he calms down. Has he been fixed? If not, do so ASAP.I have a new dog who is slowing becoming more aggressive towards other dogs.?
Hes probably trying to establish dominance towards the other dogs if hes older enough and not already try getting him neutered see if that helps. Good Luck.
michael vick has some tips i bet