Check where and how they are sleeping when the heat is on. It is perfectly normal for them to sleep in a group even if there is plenty of heat. They are social animals and really like each others' company. My chicks usually sleep together in corners in the coop where they feel they have some protection especially if there is no light at night. That's after I take them out of the brooder and stop providing heat. In my brooder, they often sleep in the open fairly close to the light but not right under it. They are still usually in a fairly tight group. My broody hens usually take their chicks to a corner where she feels safer than in the open. I certainly don't provide any heat when I have a broody.
If they were cold you should have heard a real plaintive peeping. If you've ever heard their distress peep you'll remember it.
The best way to tell if they are too hot or too cold is by their actions, but don't let their standard practices cause you to jump to the wrong conclusion.
If they were cold you should have heard a real plaintive peeping. If you've ever heard their distress peep you'll remember it.
The best way to tell if they are too hot or too cold is by their actions, but don't let their standard practices cause you to jump to the wrong conclusion.