also what about light and temp?
if this is an adult with decent size and fat reserves he may just want to take a nap. 
really: if the night time temps get to say 75 and if he can see the sunset or if the artifical day lenght is less than 10 hours it could trigger burmination.
you may want to make sure you give lots of light and keep him above 70-75 at night.
also even if your light duration and night temps are good he may still go thru a few adjustmnent periods.
has poop been every day or ???
what age ?
length ?
grams body weight?
what can you tell us about prior care, lights,temps?
he may just need a few weeks to sort out the changes.
but do have a fecal done -- never hurts and may spot a problem.
-----
This space reserved for future use...