Keep your rabbit indoors overnight. Ensure the rabbit is warm (but not hot). If your rabbit is elderly or it is particularly cold outside, it may be necessary to keep him/her indoors for a longer period during recovery.
Offer your rabbit a bowl of water, even if a water bottle is usually used. Your rabbit needs to drink after surgery, but often won't do so if he/she has to 'work' for theri water. They will recover quicker if they are well hydrated.
If your rabbit is reluctant to eat after surgery, offer a favourite treat.
If your rabbit has not eaten ANYTHING within 24 hours of surgery, contact the surgery.
Monitor the output of faecal pellets closely. If faecal output slows or stops after surgery, your rabbit may be suffering from gut stasis due to the stress of the surgery, especially if the rabbit was unwell to begin with.