Heat lamp for mailed chicks?

[NatJ]

So technically the heat lamp is only needed until they bounce back? It’s our first time getting mailed chicks I’m so glad they sent that article!

Basically yes, but "bounce back" could take a day or two, not just the first hour or two. They need to eat, and digest that food to give them more energy, and eat some more, all interspersed with drinking and sleeping, and they are also learning what stuff is good to eat and where to find it.