We use a pet heat plate (it stays around 100.5) and the bathroom sink lights.Three 125 watt bulbs the first week. 2 of the 125 watt bulbs the second week and one 60 watt bulb, and for the third week its all 60 watt bulbs. The a/c vent is closed off and the shower curtain covers them from direct light when they are on the pad. Last week they were sometime panting so we left the lights off a few hours at a time to get the temp down in the roomHow do you keep them warm?