Having a sick bun is truly exhausting. 🙁 When I was caring for a chronically ill foster, it helped me to have a schedule, so I wasn’t just constantly fussing over him. It was still a lot, but generally making sure you get some food into them every 6 hours (during the day) is enough, and then it is important to sleep at night, so I would just do a feeding before bed and one first thing in the morning. Buns need to rest as well, so this gives them a chance to sleep and eat a bit on their own.
I wonder if you could have your vet show you some of their techniques for getting fluids and food into her more effectively? Trips back and forth to the vet are tiring for you and can sometimes delay recovery due to the stress of it all. You might also ask your vet if a different motility med such as cisapride might be useful, sometimes even a combination of medications are given.
I think bun’s sensitivity with things like this comes from the fact that they were unfortunately not bred or evolved to live long lives. Wild rabbits live fast and die young, and domestic rabbits were also bred to reproduce and grow quickly. Even now the pet breeds we have are typically selected for looks and not health, because they can produce offspring before any health problems may show up. There’s also the added layer that even though we do the best we can, a pet rabbit’s diet is not the same as a wild rabbit’s, who would be eating a wide variety of grasses and plants. Horses strangely enough are very similar. They too cannot throw up, so gastric issues that would be mild in a dog are enough to kill a horse pretty quickly.
I also just noticed your bun may have a version of the “charlie” markings? There is actually a genetic condition linked to that coloration pattern that is rare, but can cause issues with chronic stasis and GI issues. It’s called megacolon or cow pile syndrome. When your bun is pooping normally, are the poops pretty uniform in size and shape? Or do you notice some very large or irregular ones? Here’s some brief background on megacolon: https://wabbitwiki.com/wiki/Megacolon
IF that is something that seems like it could be a possibility, you should discuss with your vet. Megacolon buns often have trouble keeping weight on and so they sometimes do best when free-fed pellets.
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.