Can relate! Myra is about to go through a big molt and I’m bracing myself for a grumpy bunny (she is gets hit the worst, prob because she has such a luxurious coat).
More fiber and more water helps move the hair through. So getting creative about offering hay in dif ways can help, or even offering a different type in addition. Feeding veggies sopping wet also helps.
If he tolerates hand plucking and it seems effective, then I would just do that as much as possible. Some bunnies really like being lint rolled and it can work really well for certain hair types. If you think you need to do a deeper grooming (like hand plucking isn’t really working well or they don’t tolerate it), I will usually put Myra on a table and do a thorough grooming every couple days during molting time. She is not happy with me during, but it gets most of the fur off and then she is much happier after. It must be so annoying having all that loose fur on you!
I also think there also may be something with molting that can cause a bit of tummy upset just through the hormonal changes, not necessarily because they ingest too much fur. At least with Myra, extra fluids seems to help a lot with this. So if you notice Dorian goes off his food or just seems really uncomfortable, you could offer him some hay tea or syringe him a little water to see if that perks him up.
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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.