We just got our babies today...3 to start with 5 more coming. I can't get the temp warmer than 89/90 and don't have time to run out to get another heat lamp. Can I put a heating pad - on low, under a towel - under their brooder for tonight? Also, one them seem to be falling asleep while sitting up - like I used to nod off in Calculus class. She seems to fall asleep and then jerk awake. Is this how they sleep? Thanks!