He is lovely!
I have bought some of the minced meats from pets at home, 400g blocks. Yesterday they had a block of rabbit each i split it for three meals and mixed it with two tins of the natures menu each - to try and get some weight back on them. Hopefully they can fully change over to the blocks, which are cheaper! Thanks for the advice
I didn't realise the meat type should be changed either so hopefully changing it will help too
Remember not to feed too much rabbit, it can cause issues because it's so low in fat! (Called rabbit starvation, I think?) To add weight, up amounts and look at something fatty like lamb and oily fish.