“I’m starting to wonder if the “rescue” dog was actually an attack dog used by the Bidens to protect them from surveillance.”
“Rescue” dogs are notoriously bred by either puppy farms (mills) or by people who know nothing of dog genetics. Poor Major is what is known as a fear biter. Champ, the older dog, came from a breeder who used German imported parents. These German imported dogs are calm and have “good nerves”. Champ was unflappable as opposed to the hapless Major.
Major’s biting is not his fault. The fault lies with whoever used his parents to produce him.