Pet turtles do not hibernate like some other animals. They are ectothermic, which means they depend on their environment to regulate their body temperature. However, during the colder months, turtles may become less active and might appear to be hibernating. To prevent your pet turtle from becoming lethargic due to lower temperatures, ensure that its enclosure is kept at a suitable temperature range, provide a heat lamp or heating pad, and monitor its activity levels regularly. It's also essential to give them a proper diet and maintain a consistent light schedule to mimic natural daylight cycles.