That was quite a wt loss! Scary! I can see why the vet would want foods that can quickly bring them back to the normal wt. My bun just stopped eating his pellets and won't eat them at all. He is battling a bit of stasis. He is eating hay, at least. And gets greens like cilantro and parsley. Seems enough for now. I was looking online for a liquid fruit flavor that I can put in a spray bottle and sprinkle the pellets with or the hay (when he decreased the intake). Maybe a jar of dried mint leaves (ground) to sprinkle on things he is refusing. There is another recovery food they are using in the UK and New Zealand that I am trying to find here, it is super high in fiber (42% v 27% for the ones in the US). It is the DualCare Recovery by Burgess.