Yes, like Laura mentioned , a healthy weight on a healthy dragon is important for pre - brumation conditions. If the dragons are 9-10 months and big dragons, 16+ inches, and good weight, not too skinny, they should be fine. Some dragons are small for their age, like 12-13" at 9 months, I would keep an eye on these from going in to a true brumation by keeping the lights/ temps. as they normally are for summer, and keep offering [ but not forcing ] food and water. Another thing to consider is that a dragon kept in a house where the temps. don't go below 70 may have a higher metabolism and continue to have their sleep/ awake episodes and these probably should be offered water if they have their eyes open and become active at all. The cooler temps. between 60-70 [ day and night] are generally when the dragons really sleep hard and don't need to be bothered.