They tend to do it a bit differently so it's hard to say for sure. When Darwin goes into it, he gets pretty sleepy and goes to sleep earlier and eats less. Eventually he sleeps for days and weeks at a time and opens his eyes to look around briefly once in a while. I leave the lighting the same but don't bother with food (he isn't hungry anyway). Then he wakes up and gets active over the course of a couple of weeks and then gets REALLY hyper for a month or two. Then returns to normal.