This is our 3rd brood of bantams and we are using the same lights and some set up for brooder box. Our first set of chicks did fine, no pasty butt or anything else. But our second set (4) died, not sure what from though. Now 1 is dead from our 3rd brood and the other 3 I just looked at and they had poo on their bums. Have cleaned them with warm water and dried them, they are back in the brooder with 2 lamps to get the temp up, but what should that temp be??