slightly aggressive red heeler/ greyhound mutt
My dog is about 14 months old. He has always been slightly fearful of other dogs. The dog park used to be a total nightmare for him. He would tuck his tail and cry and hide behind me. He has gotten better in that sense, he even plays with other dogs. For some reason though he always takes it too far now, especially with puppies. He will even play at first, but then he will snap. Something happens mid play and he gets mad and will start barking and growling and showing his teeth. He has never drawn blood from another dog, but I am afraid he will if I don't stop it. He changes from friendly to aggressive so quick its hard for me to see it coming and stop it before it happens. Once it has started, he remains focused. No time out or distraction will make him forget. He will go back to that dog immediately and start pinning it on the ground and growling and chasing it and will not stop. He will not submit ever! Don't know what to do. He hates dogs on leashes also. Seems like he would like to attack them.