Hello, many rabbits who feed piano rabbits at home have this phenomenon in your home. They only like to eat harp rabbits, and they don't eat anything else or grass. So if your rabbit has this phenomenon, I suggest you change to a rabbit food, such as Beixian. Bunny can't eat fresh vegetables. Now I don't eat for 24 hours, just feed water. At the same time, feed half a tablet of vitamin C, 4 tablets of lactase in the morning and evening, 5 ml of glucose water per hour, not less than 40 ml per day. You'd better have a look at the tumor in the picture, or the doctor will not give advice because of the poor description.