Quote: Also, getting older chicks may introduce integration issues...even just 2 weeks can elude harmony.
Hover brooders aren't quite the same....there's the blaring light and radiant heat rather than contact heat.
Tho the 'sweeter heater' which uses contact heat has been around for more than a few years AFAIK.
You are courageous! Are you just starting with Chickens and diving right in? I would guess that you need a lot of these, or some way to make a cave that is wide but shallow... you would still have to have several heating pads, but I haven't tried this yet! I think you need advice from @Blooie 