It can be frustrating to convince people that rabbits are not like dogs or cats (where not eating for a day can just mean the animal is tired of its food). 🙁
I’ve found that many people are more aware of the fact that horses have sensitive stomachs and that GI issues in horses can become emergencies (many people are aware of “colic” in horses), so I will often explain that rabbits are like tiny horses (my vet has actually said that rabbit and horse medicine are almost identical!). They can’t throw up and must eat often to keep things running. I also often explain that because rabbits are prey animals in nature, they hide their symptoms very well, so it’s important to be vigilant and notice anything that seems like a change for your bunny, which you did!
I also think sometimes people think “well, what can a vet even do for a rabbit?”, which in the past may have been true. But rabbit medicine has come a long way, and giving a bun supportive care in the form of pain meds, fluids, and other medicines can save a bun’s life.
In general, a rabbit snubbing all food for more than a few hours is cause for alarm bells, especially if it’s during a time the bun is normally hungry. More subtle changes in appetite can be an early warning that a GI problem is brewing, an indicator of dental pain, or some other indicator of pain. It can also mean a bad batch of hay or pellets, like if you get a new bag of food and suddenly the bun doesn’t want it.
One of my bunnies, Myra, often gets kind of grumpy and weird when she first starts molting. I usually give her a tummy rub, some simethicone, and oral fluids if she doesn’t want to eat. So far she has always perked up within an hour, so I haven’t needed to rush her off to the vet for further treatment.
Hopefully with fewer pellets your bun will perk up and pass the fur more easily!
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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.