Hi Kirawall. I am a relatively new bunny owner, but I have had a bunny with GI issues. But I’m hoping at the very least this comment will give your post a boost so some of the more knowledgeable people on this forum can help!

I know bunny’s should not go 24 hours with out eating. I’m glad to hear that they have had some water.
Have you tried their favourite treats? I know its not the most healthy, but that will sometimes get their appetite going.

If not you can try to make a “pellet paste” … You can also buy critical care that you just mix with water, but this can work too…. so take some pellets and mix it in with some warm water and use the back of a spoon to mush it up and see if they will lick that up.
If not you can also go to a local pharmacy and get a plastic syringe that they use to give baby medicine (They’ll usually give you this for free at the counter) suck some of the pellet paste up into the syringe and the bunny’s mouth
– just google search “how to syringe feed a rabbit” and there are a lot of useful video’s that show you the technique and how to get it in to their mouth. But the best advice I can give there is to go nice and slow.
You can do the same with water or water down the pellet paste you made up more to get more water in to them.

I hope your bunny’s are doing better since you last posted.

Please call your vet at least for a consultation over the phone. If they’re not eating it might be they need a different pain management or may be at early stages of GI stasis.

I would call the vet. In the meantime, you can make a pellet paste and syringe feed as Nutmeg suggested.