Hi, I have a male mini Rex (named Rex) who I am concerned about his weight. He weighs 6 pounds, and from what I read online, they should weigh no more than 4 1/2. After he had stopped growing, he started getting fatter, so I put him on a diet that I had gotten from a book. The book had stated that Rex and Mini Rex rabbits need to eat mainly vegetables and hay with only a small portion of pellets. So that's what I started feeding him, mostly vegetables and hay with a small portion of pellets, however, the whole time I failed to notice that he was no longer fat but skinny, like maybe even dangerously skinny. So one day, when I had taken him out to play my dad pointed out to me what was happening. So after that, I went back to feeding him mostly pellets along with hay, and some vegetables on the side. Know though after several years I'm beginning to what to do something about his weight, but I don't want to do anything that will be dangerous or unhealthy to him. Does anyone know what I should be feeding him or be doing to get his weight down? Below is are some pictures of him. Thank you for your help!