Gas pain can cause a rabbit to go off of their food and behavior normally. As prey animals, rabbits hide their symptoms. What treatment is your bun on for stasis and bloating? Is your vet rabbit savvy? Many things can cause stasis and gas issues, aside from cancer, so I would want to rule out everything else first. Can you also describe her diet in detail, and how old she is?
With what you described it sounds like she should be on pain medication, supportive care (fluids, syringe feeding), and possibly a motility medication.
I would not start experimenting with cbd or hemp at this time, you need to get her an accurate diagnosis and make sure she’s getting care that is proven to work in rabbits. Whenever I find conflicting info on a substance for rabbits I avoid it.
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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.