Ditto what @Blooie said about meat birds not needing as much heat and they grow FAST. Raise the pad up, give more room for them than you would for laying breeds and keep the pad set on low temp. You will hear "distress peeping" if they are too cold but if they are too hot, they will just die without communicating...other than staying out from under the pad if they are healthy enough to move out from under it.
They give you extras because they know a few will not make it through the shipping stress.
Did you make sure they all had a good drink on arrival and that they know where the waterer is?
They give you extras because they know a few will not make it through the shipping stress.
Did you make sure they all had a good drink on arrival and that they know where the waterer is?