Hello, Chris and welcome.
My name is ***** ***** I will be glad to assist you with your question about Henry.
I'm so sorry this is happening and I'm also sorry for all you had to go through, medically, last December!
Many times, a normal, loving, passive cat will show this sudden aggression when he has experienced a startling or frustrating situation and then, his aggression is 'misdirected' towards the human (or other pet) he feels closest to, in the home. I don't think you're doing anything specific to aggravate this behavior. it's possible he may be jealous of your husband and he gets upset when you go to sleep in the same bed. Here is more information about redirected or misdirected aggression in cats:
You can start using Feliway plug in diffusers which emit calming pheromones that only cats can detect; it has no scent to humans. This might help him feel more secure and less stressed.
Calming pheromones also come in a collar, so the cats wears it 24/7 and is always smelling the pheromones. Here are two types:
You can also put 'soft paws', vinyl claw caps on his claws to prevent serious scratches.
It would also be a good idea to have Henry checked out by his vet, to make sure there is no underlying medical condition which is causing him to be this aggressive or is causing him pain.
I hope this helps and Henry will return to his loving self, very soon!
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