My puppy is having high sexual drives towards other dogs. Whenever we walk in the park and he sees a dog, he will get very angry and growls/barks like he wants to kill the dog. Its really embarassing because its like we're making a scene in the park and people are telling me not to bring my dog again in the park because he might bite a person. He gets angry too when he sees a running child. Im afraid that he might get lazy and thin just like my past dogs because of neutering. Help me please.