Get this baby in his own cage with low branches make sure he has a correct hot spot and correct UBV no coil lights. Have your friend get him some silk worms as they have a good amount of calcium. You can use a tall tub for now as he looks small. Chams should not be housed together after about 3 months old the bigger ones will keep the small ones from eating. He may also be dehydrated more misting a day may also help. He may also be lacking calcium. The wobble can be an early sign of MBD. I hope he recovers. Chams are cool but alot of work.