if she doesn't drink after 12 hr., you have to force feed juice into her. Their recovery can take up to 2 days. The min. guide line is 50 ml PER KG of body weight.
So if your bun weighs 2 KG, gives 100 ml per 24 hr.
Is the bun given metacam? As they should be on metacam for 3 days.
Also, give as much bunny treats to your bun to induce her diet again. So you don't need to expect your bun to eat the hay for the first 48 hr.
1 last thing, don't let your bun to have the means to jump to a higher ground, like a chair, as that will torn the wound.
If your bun licks or pull the wound, use non-sterile pad w/ green tape to cover the entire region, that's how I did mine and the wound still heals nicely.