I posted a few months ago about Benny biting the neighbor… He now growls and snaps at strangers who come in the house (but only when they try to pet him), and even my mom, who he used to love. But here is the strange thing, he runs up to them with his ears back and his tail wagging, but when they go to pet him, he snaps at them... I don't know what to do (other than tell people not to pet him).
Today, he ran up to my sister when she walked in the door (he's been growling at her and my nephew for about 4 months now) and jumped on her with his ears back and tail wagging, and tried to bite her when she went to pet him.
We've had his thyroid tested, and it came back fine. Hired a trainer, who he bit pretty good (when he tried to force him on the ground)... I didn't like the trainer's methods, so we never allowed him to come back. He used to be sweet and gentle with everyone, now he snaps at people.
A dog park opened up recently, and he runs up to people there and lets them pet him, it's only when people come in the house and when we take him for walks around the neighborhood.