I've noticed my (3 or 4 day old) chicks seem to be struggling to poop. They squat down, look like they're pushing really hard, but barely any poop comes out. They're eating and drinking well. Right now their brooder is indoors in a 20-21°C room with a heat panel, but I plan on moving the brooder outside in the coop next week. Some have a bit of poop stuck, but it doesn't seem to be covering the vent. Maybe the heater is too low? I have one end lower and one higher, but some still prefer to sleep next to the heater. No unhappy chirps though.