I have 3 three dogs, a German Shepperd Rottweiler mix, Shi tzu, and a Golden Retriever Black Lab mix. All of my dogs are very nice and obedient, but when other dogs come over or we take them to the dog park the black lab mix will get very aggressive and attack other dogs. He has thyroid, and isnt aggressive near my dogs. I am wondering why he acts like this, and wondering if theirs a way to train him to be nice.
Answer by Bree
Try petting him and giving him treats when he sees another dog. Reward him when he is calm. When you are walking him and a dog is coming walk on the other side of the street and stop and give him treats while the other is walking pass