What kind of cham is it? Make sure you have proper UVB lighting and calcium supplements. The recommended lighting is a reptisun 5.0 UVB linear flourescent. If one of the compact flourescent or spiral UVB bulbs were used they have been reported to cause blindness. No UVB at all and you could be looking at a case of MBD. Vet care is definitely required either way but you can at least provide the proper lighting in the mean time. I use rep-cal w/o D3 nearly every feeding lightly dusted on crickets, and Rep-cal w/ D3 twice a month. Make sure your cham is well hydrated. Hornworms or silkworms are great for this if he will eat them. If you can get him to drink from a turkey baster dripping slowly on the end of his nose that would work also. Any way you can, get him to drink as much as possible. PM me if you want more information. I have a pretty good care sheet that covers most of the important points of basic husbandry for Panthers and Veilds are nearly identical in there care requirements. Good luck!