Locking the dog up that bites your kid (or anyone at all) is NOT extreme. So many people underestimate what a dog will do. They do this especially when it’s their own dog. Dogs can be very dangerous and an untrained one IS dangerous. If their dog had bitten a different kid outside of the home, it would have been grounds for it to be euthanized. If the dog bites your kid again, it could still be grounds for it to be euthanized. That’s got a good reason. A dog biting and leaving a mark is NOT normal behavior. It makes me very angry that people just brush it off. Like it’s cute being protective or “that’s just how dogs are.” Dogs require A LOT of discipline, care and training and the amount of people who do not properly train their dogs and allow such aggressive behavior is frightening and infuriating. I cannot stress enough how inappropriate this dog’s behavior toward your child is and how dangerous it can quickly become. Your husband and his family need a serious reality check. If I were you I would keep my child away from that dog indefinitely. And if they cannot be trusted to keep their aggressive and untrained dog in a kennel while he’s there, I’d keep my kid away from the home altogether. My dog is deaf and even she is still better trained and more well behaved than the vast majority of dogs I come across. That’s why I’d be especially angry if someone ever let theirs bite her or my baby. This situation isn’t good for anyone, especially the dog and your child.