I know there are a thousand of these topics online, but nothing I've read has been helpful, so I figured it would be best to just ask again with my information. So, I bought two leopard geckos not too long ago (less than 2 months), and one is doing amazingly well (the female) and one continues to lose weight (the male). He's so much smaller than the female, and he's beginning to look downright unhealthy. I've done everything I can think of to help him. When I first got him, I saw him at least try to eat, but he was very bad at it. He would go for crickets and miss completely, even if they weren't moving. On the advice of several places, I switched from sand to paper, but I haven't seen him go for crickets since then (a couple weeks ago). He's never showed any interest in mealworms. I took him to the vet, he's not impacted, he's been given a de-wormer, and now he is on a calcium supplement and I am feeding him this cat food stuff that I was given by the vet. I still try to feed him crickets and mealworms, he seems completely uninterested in them. Now he's shedding and not eating the shed. I take the female out when I feed him, he has a humid hide, I have several different thermometers that are always between 85-95 on the warm side, and he is pooping, but it's something akin to diarrhea. Is there something I'm not doing or something that might encourage him to eat? Is it hopeless? Yes, I know I can return him, but there's no way I'm doing that.