It is hard to say from the pictures, but the second photo may show some swelling around the base as mentioned above. I have seen this before in pet stores and photos. Honestly, I am not completely sure what the cause is. I have read that it may be related to vitamin-A deficiencies. Hopefully someone more experienced can post their thoughts.
What are you feeding your cham? What are you gutloading those feeders with? What kind of dusting do you use and what is your schedule? If you do not have one already, I highly advise looking for a [THREAD=67]qualified veterinarian[/THREAD].