LeslieJones

Hi! I have a Jack Russell terrier mix that I rescued who is deaf. He is 4 yrs. old and very sweet natured. He is food aggressive and treat aggressive with other dogs but never with humans. I recently adopted 2 female chocolate lab puppies who are 16 weeks old. They play well with Jack and are submissive to him. Lately he has begun attacking one of them. At first I thought it was because I was petting the puppy. But it is happening when I'm not around. Any ideas?