Ask the vet - Rabbit
My rabbit isn’t drinking. What should I do?
Vet at FirstVet answers:
First try to determine how much and how often your rabbit is urinating. If it seems to be peeing as often and much as it normally does then it is likely you haven’t observed your rabbit drinking. If a rabbit is mainly fed fresh greens during a period of time it will naturally drink less than when it is fed a dry diet (such as that mainly consisting of hay).
If your rabbit however is also urinating less than usual you will need to help it drink. It is best to consult a veterinarian for help as it is likely your rabbit is sick.