Is the thermometer on each side down on the floor? It's amazing how temps fluctuate from floor to high up. The running around is a sign that you're doing great. It's like said, just really tough in any container whether glass, hard plastic or metal that only has air flow over the top with a heat source in the bottom. The best brooders have side ventilation too. You don't have to get creative with feeding babies. Commercial starter with added water is all they need. You can give them cut up worms for extra protein but don't replace main food source with that.I plan to move them into something before they outgrow it, I replaced the top mesh part to provide better air flow, I have a thermometer on both sides of the enclosure, the side with the light says its 87 F right now, and on the opposite side it says it's 69 F. Is that too hot? They seem pretty happy, and run around with little pieces of food. I have this whole fenced in area they can play in, it's room temperature and has lots of places to play, I open the door and let them go play when I have the time, they seem to love that. I'm going to get some grit today, can they eat Super worms or hornworms? I've got a bunch of little baby ones right now. Thank you all so very much for your help!