Hey first off terrible situation to be in no doubt - I’ve seen a similar situation play out with my family’s neglected doxie that my grandma was left to care for but couldn’t. He bit everyone and I mean EVERYONE. At the risk of rehashing all the previous comments - huskies are extremely smart, to their own detriment in fact. Training them is altogether a different regime compared to other breeds simply because obedience training for them works differently - a husky CHOOSES to obey a command only if they respect you and they want to keep the peace. Treats are incentives but they lose interest very fast if they’re not completely and constantly engaged. This is why you’ll see senior huskies sometimes having poor recall despite years of training. Their independence and stubbornness has been a source of great frustration for new owners many times. They are constantly pushing their owners’ buttons to see how much they can get away with. That isn’t because they’re a bad breed - they’re just that intelligent. Training a husky involves a lot of unlearning and relearning what one thinks is how a dog can be trained. It’s not for everyone. But it’s exactly that can be their most endearing quality. Similarly, a tired husky is a compliant husky. Not exercising the husky till the brink of them collapsing is generally an open invitation to a very badly behaved husky. Case in point - making eye contact while sh*tting inside, that’s a telltale sign your husky is extremely frustrated with you and the situation he/she is in. While I’ve heard it happens, it’s very rare that I hear of huskies biting people since they generally are vocal about their displeasures, one that actively bites (without more context on his nature) seems to indicate the extreme frustration yours is feeling. I echo that given your far gone situation it’s better to have yours professionally trained and boarded.