My 9 yr old Flemish giant is slowly losing weight. Last fall just before his vet visit he had a GI status episode and a stroke. My vet (rabbit specialist) diagnosed a terminal liver issue. She gave him weeks rather than months. Fortunately she was wrong on timing, and six months later he is still with us. Lately, he is starting to look a little thin. He still eats well. I hesitate to change his diet too much as he is very sensitive and will have digestive issues. He gets free choice Timothy pellets, kale and the occasional grape and cherry tomato. I've tried hay, but he does not like it. He is old and is not in the best of health, but perhaps I can add a little something to his diet.