What was your setup for him? Did you have a extremely hot (115+) hot spot? Did you suppliment with UVA/UVB? Did you suppliment with calcium and leafy greens? At that age they are almost completely on veggies. What did you keep him on? He may have got impacted if it was something he could ingest i.e (sand, dirt, etc.). Sorry for your lose, just trying to help you out.