I have a 7 month old male English Bulldog named Diesel. He has always been well behaved for being a puppy he is very outgoing and loved other dogs but recently one of my friends moved into the house that I am living in and her dog is a American Bulldog crossed with a Pitbull. When they "play" at least that was what I thought they were doing they are very aggressive and mean and have stared to bite one another. Her dog is close to 100 pounds more than what my dog weighs (he is about 50 pounds right now) and he always pushes him around and pins him down which he does not like. They also fight over Diesels toys and more than once it has turned into a dog fight where they started snarling and biting at each other it was not pleasent.
Since the day that Diesel has had all his shots i started taking him to a local doggy daycare from 730 am to 5 pm while i am work and he plays with other dogs because i wanted him socialized and nice to others and all of a sudden (about 5 days after this other dog moved in) he bit another dog at daycare and drew blood and started more than one dog fight as well. Why is this happening and is there anything I can do to stop this aggression and problem before it gets to bad??
And suggestions or ideas are greatly appreciated this is my first bully and I thought that we were already passed the aggression issues!!