I hope that Hamilton has continued to improve overnight. Personally I'd take the cardboard box away from him if he's nibbling it as it's best that he does not ingest cardboard whilst his GI tract motility is already compromised.
Sending more vibes for him and I hope that you are feeling a bit better today too
I agree with JJ about the cardboard box, I’m afraid Frosty and Fern can’t have cardboard things as Frosty eats it and it causes a gut slowdown in him I’ve noticed.
Topping up the vibes for you both xx