As promised, I'm posting some pictures of Boscoe with his BiteNot collar. It may look like he is not happy with it, but that is the drugs talking, he is actually much more comfortable now. The e-collar was keeping him sopping wet on his jaw and neck because the drugs make him drool. This is keeping him clean and dry and he can actually eat rather than simply slop it into his e-collar.
It works like an e-collar because it keeps him from turning his head tightly, sort of like one of those neck braces, but stronger. He can still get to his front paws, so he can still hold his treats to eat them. Bonus! When he lays down it pushes some of his loose skin rolls foward so he gets this little scowling wrinkles on his forehead.
I'm still very worried about him and scared of potential infection, ligaments popping loose or any number of things...but at least he is a bit more comfortable!