My 4.5 year old dragon, John, isn't eating. He has 3 sarcoma tumors. They're external, and he's getting surgery in January, but he's being very grouchy and not eating. I imagine because he's not feeling well especially with the medicine we have to give him. Per our vet, we are giving him doses of water with his meds. Does anyone have recommendations for ways we can get him nutrients without force-feeding him?