Quote Originally Posted by DVirginiana View Post
Can you put up a picture of your frog? When you say he got light brown, did you notice a sort of thick mucous-like covering over his body (sign of aestivation)?

It sounds like he's trying to aestivate, but it's a bit odd that he started then came out, then started again.
Temp fluctuations could cause the frog to go in and out. Seasonal changes can cause all kinds of strange behavior.