I agree with Connie. And, one more thing to keep in mind.
When they are in the wild, their molts are probably a bit more
predictable due to the seasons. But since they now live inside
with us, in our climate controlled enviornment, molts can
happen at any time and more often than they might if outside.
So long as you are not seeing any bare spots on their body,
there is probably nothing to worry about.