Should a very large,border jumbo,molt every 4 months? His last molt took 9 weeks and 2 molts before that took 7 weeks,but has been molting every 4 months. He is in a 1 1/4 shell. Trixie? I know you have the same size as me for the same amount of time,but yours was molting only 1 or 2 times a year?