Aggressive Yorkshire Terrier
We've had our 4yr old yorkie for 2 months. Most of the time he is a joy to have, but there are times when he becomes so aggressive it is frightening. He can be sitting/lying peacefully, but then will suddenly jump up barking & trying to bite us. My husband had to have a tetanus jab because the dog bite had broken his skin.
He has been neutered. We've had him checked at the vets and he got a clean bill of health, so it's not a health issue. Please help!