Diarrhea in rabbits is a very serious concern. Your veterinarian can examine your rabbit's stool for parasites and microorganisms that cause diarrhea. A rabbit forming too few droppings and not eating may be very ill. Contact your veterinarian when your rabbit shows any signs of not eating or loose stool. At times your rabbit's urine may turn red tinged or brown.
Normal rabbits wear their teeth down as they chew.
However, some rabbits have trouble keeping their teeth from overgrowing which causes severe discomfort and sometimes starvation leading to death. Rabbits with abnormal teeth should not be bred because this trait can be passed on. These rabbits will need to have their teeth trimmed frequently or have them extracted. Because rabbits groom themselves frequently, they are susceptible to intestinal hairballs. Signs of hairballs include sudden lethargy, and a decrease in droppings.