We've done meat birds in 4-H for many years now, and both my daughters have won CH or RCH a number of times. Never had a radio on, that's a good idea. One thing we've found is that Cornish cross birds are not very resistant to heat. We keep our brooders in the basement of our house, which is air conditioned. We try to make the transition to the outside pens before it gets too hot out, so they aren't shocked by the change.
Another trick we do (not everyone does) is add one plain, generic aspirin per gallon of water per day for them. Often meat birds will "flip" (flop over and die) because their hearts can't stand some sort of strain (they grow too fast!), and the aspirin helps them, just as it does humans with heart issues.
Not Tylenol, not Bufferin, not Exedrin, just plain old aspirin.
Cheers,
Another trick we do (not everyone does) is add one plain, generic aspirin per gallon of water per day for them. Often meat birds will "flip" (flop over and die) because their hearts can't stand some sort of strain (they grow too fast!), and the aspirin helps them, just as it does humans with heart issues.
Not Tylenol, not Bufferin, not Exedrin, just plain old aspirin.
Cheers,