Please take this cham to an exotic pet vet! Untill you do, offer running (dripping) water and vitamin/calcium fortified meals twice a day but do not force feed it untill you see a vet. Privide some UVB/UVA tropival (5%) light for at least 8 hours. Keep it in a quiet part of the house, away from flashes, noise, other pets, etc. Don't handle it unless you have to. Keep the enclosure clean and free of wandering prey. Some pet stores offer a product called sun drops, helps your animal absorb and use calcium better, you can try that along with some loaded dusted food. I hope your friend recovers, good luck.
