My babies are 3.5 weeks old, and they seem to be blowing all the suggested temps out of the water. They already have very little supplemental heat, the bulb they have is 13W and it's 4 ft from the ground, so there is very little heat coming off of it for them, it's mostly for the light. This was fine in my craft room as it rarely got below 70 degrees in there. Today we moved them to the bunny room (yes, our bunnies have their own room in our house), and it's a colder room. Right now the temp about a foot from the center of the light halo is about 63F. This is them right now (the big clump is in the center of the light halo):
So what do you think?
They don't seem to be any closer or further apart than normal. Up until the move the 3-4 biggest ones always seemed hot, especially when sleeping, which is why we've moved them to a cooler room. We couldn't lower the temp in the other room because we've got the Littles in there. Gratuitous cute picture (Kirk, Picard, Riker, Spock):
Mama to a whole bunch of birds. An unknown # of chicks, 10 EE, 1 RIR, 1 BR, 2 SLW, 3 silkies, 1 Cuckoo Maran, 2 blue cochin, 4 turkens, 2 doms, 6 barnyard babies, 4? black broiler sweeties I can't eat, and 3 embden geese. (36 chickens, 3 geese)
Mama to a whole bunch of birds. An unknown # of chicks, 10 EE, 1 RIR, 1 BR, 2 SLW, 3 silkies, 1 Cuckoo Maran, 2 blue cochin, 4 turkens, 2 doms, 6 barnyard babies, 4? black broiler sweeties I can't eat, and 3 embden geese. (36 chickens, 3 geese)
) The temp. should be around 80f for that age of chicks. How is their poop? If the poop is watery then that means they're cold. Try to get the heat lamp a little closer to them, or you could get a stronger bulb. 
