Sorry this question is a bit long. Here are the details about our dog:
-age 3 male whippet
-we've had him since he was 2 years old
-former owners got divorced and decided to give him up for adoption
-very well trained, obedient, kind
-submissive if tested (ie we can put him on his back, take his food, etc)
-is not free fed
-gets lots of exercise
-sleeps on the floor in another room
Here is our current issue:
-About 2 months ago, our dog was lying on a chair at my parent's house relaxing and my 8 year old cousin went over to pet him. He snapped at her and left a small cut on her cheek. No one saw if she had been bugging him or not so everyone said it wasn't his fault and let it go.
About a month ago, our dog was relaxing on the couch and my husband went to nudge him off of it. The dog turned and snapped at his face, breaking the skin around his eyebrow.
We took him to the vet to make sure it wasn't a medical issue. She checked and put pressure on all his joints, ligaments, checked his eyes, ears etc and found nothing. She suggested it may be dominance aggression and to try some beahvioral training and testing on him.
We stuck with the training. We never let him on the couch, we did not free feed him, he did not tug on his leash, he did not jump up, we went through doors and down stairs first, and he obeyed every command we gave. We tested him by bugging him while sleeping, putting him on his back in a submissive position, and tried repeating the same situations that lead to biting last time. He was totally fine.
But then, last night he was laying down on the floor. I went to gently nudge him and told him it was time to go outside for his bathroom break. He snapped back and tried to bite my foot but I moved it away in time. My husband saw this and told him to go downstairs. The dog didn't move and continued to bare his teeth. My husband told him again and the dog lunged up and bit him on the chin.
When I told the vet about this recent situation, she now thinks it may be either nerve damage or something wrong with his brain chemistry given that it is so random, he shows no other signs of dominance, and it is completely out of character for him, especially being a whippet.
We are now at the point where we need to consider euthanizing him because we have a baby on the way and will not have a dangerous dog in the house. We don't know about rehoming him because I do not want someone else to get hurt since this is so unpredictable. I don't want to leave him at a shelter because he may get scared and I'd rather have his last moments with us than in a strange kennel somewhere...
Any advice you have would be greatly appreciated.
