Exactly, When I first had dragons that brumated, Lonzo and Sweetie Pie, they went to sleep in Dec/Jan and woke up in Mar/Apr ready for spring & summer, then they'd get sleepy in Oct/Nov. That was every year. As they got older and passed away, the dragons that came to live with me, Cierra, Nathaniel and Castiel were sleeping in July/August. That really took me by surprise their first summer, I couldn't at first figure out what was going on. Then it dawned on me and I did all the usual things I do before brumation with them. But May seems a bit early, even for this bunch, yet Castiel is still sleeping, week 4 now. He'll be up next Sunday for 1/2 hr
bath,
drinking water, basking and see if he goes back to sleep. When mine sleep, they're up every 2nd Sunday for
bath, bask and see if they want to go back to sleep. If they don't right away, I give them 3 days without food to make sure. Once that time is passed, they're up, like it or not.
Gabriel is my only dragon that has never brumated. I think he slept for 2 weeks one winter, didn't seem to liek it and goes to bed early instead.
Freya has already tried to sleep bit she's just a year old 1/2 old, not much older, she's small, only 17" long and is still eating, so I turned her hide upside down and keep track of her eating. Once she stops, then I'll get ready for brumating. Mine have to be empty to brumate, they're all rescues, so want to make sure they have a healthy brumation.