I have four beardeds in my class or house or split depending on the time of year. I have had them all for about 16 months. Over this period of time they all go in cycles - very active and then no activity. Is this normal? They maintain their weight when they go into their hide box for a week or two or three. I usually go in every three days or so and get them moving and get them to eat something. They usually eat a little. They do this all year - winter, spring, summer, and fall. Then all of a sudden they are very active again for about a month or two and then another inactive period comes. Any thoughts?