Sorry to hear that.
I went back and read the whole thread again. I don't think missing hay for one night will hurt but definitely load him up now. Helps with the balance of pellets and medication I believe.
What I think is he's passing cecotropes in the morning. Kreacher is the only one that I will find outside his litter box. Sometimes he doesn't eat all of them and they are a mushy mess. Scared me the first time I saw it. My other bunnies, along with the baby (Neville) all seem to eat all so I don't see any in their litter box or crate.
But because of all that's going on, the cecotropes are still watery, and could take a bit to form into a mushy instead of watery type?
It just sounds like being older and older bunnies digestive systems do change, that he's slowly trying to get his digestive system back after the tapeworm.
The Oxbow pellets, are they alfalfa? Maybe trying to change him to timothy pellets because Alfalfa based pellets are a bit rich for older bunnies. But then again, I'd be nervous to change anything now until he's back to passing mushy cecotropes.
Just rambling. Wish I could be more helpful. I've been, knock on wood, very lucky healthy bunnies. No parasites at all here. My bunnies are inside and only venture out to their bunny run in the backyard in good weather.
Hoping Molly gets her digestive tract back to normal soon. I know it must be a worry for you.
K
