Tummy noises are not necessarily a bad thing. It means his digestive tract is doing something, which is what you want. It doesn’t sound like he has true bloat, just some gas that is making its way out the stomach. Bloat is acute and your rabbit would be very, very poorly. That he is producing some poo, drinking and sampling foods are positive signs that he is on his way to recovery.
In my experience when my rabbits have stopped eating for whatever reason, they have always snubbed their pellets (nuggets). That is about the last thing they return to eating even though it’s something they are usually crazy about.
I have found they’ll eat things like rose petals and leaves, willow, thistle and other forage from the garden. Herbs are often accepted by them also. It’s like they know what their body needs during this time.
When they finally want a fruit treat or their pellets, that’s when I know they are completely back to themselves.
{{{Vibes}}} For Olly!