My bunny Oliver has been going to the vets because he seemed to have a bit of an ear infection, this was over the course of about 3-4 weeks, he’s off the antibiotics for about a week now, ears are clear and doesn’t have that floppy bunny syndrome thing although he does occasionally go a bit ‘wonky’. 
I’ve not had him out the hutch or actually picked him up in the last 2-3 days due to weather, I’ve had to keep him quite covered up. Took him out in his playpen today and noticed a dramatic drop in weight and body size. His hips are showing in certain positions and I can fit my hand around most of his body with little difficulty.
We went and bought him a new indoor cage because I don’t think he’d have made the night outside, weather’s still not great. He seems a bit happier, doesn’t really like outside anyway besides the grass eating part, but he’s weak and I’m still worried.
I called the vets for advice but i think the consensus is he’s better here with me where he’s comfortable and I can watch him and feed him as much as possible.
Basically need advise on what I can feed him to help him gain weight faster without making him sick. I was thinking my mum used to give her mini lop a bit of toast, I’ve heard maybe peanut butter, although worried about the sugar content…that kind of thing.
Any help would be appreciated and hopefully some attention and the worming tablet will help him.
Thank