Quote: when the temps are 90 degrees in the daytime we have some problems like you have mentioned. i found (with my brooders) its best to take the heat lamps out and just put in 75-100 watt bulbs. also if im running 2 lamps in the same brooder (my brooders are 2 feet high and wide and 4 feet long) i take away one lamp.
other issues ive noticed, if you are using the quart or gallon automatic waterers, feel the inside and see if they feel slimy. any signs of red or green algea are bad. if you notice the slimy feeling, soak them in bleach water for a little while. make sure you get any soaps washed out completely, as soaps can cause diahrea.
if you are using a medicated chick starter, try switching to medicated turkey starter, or an unmedicated starter. i can tell you for me (everyone's conditions are different) i have the best luck with nutrena unmedicated starter. other brands i have tried, purina, buckley brothers, triple trust, and whatever brand rural king sells.
when you said pullorum i questioned it, i know in our region its pretty rare in chickens. turkeys are the more common carrier according to Mike, the man who does our NPIP testing.