I admit that I never bothered checking the temp in my brooder. I used a big tote that my German Shepard uses for cooling off in the summer. My chicks always seemed active and happy so I never really felt obligated to. If they seemed unhappy I may have worried more. My 6 week old flock is my first, so I guess I winged it on the first go-round. However, I worked in the medical field for 10 years and I just really don't worry unless I need to.