No you don't the space is already warm remember.
It is warm, but they sometimes don’t figure that out instantly. You put ‘me in, they pop back out, repeat and repeat. What we want them to understand is that this is Mom and it’s safe and warm under there. So you hold your hand in front, and within a minute you hear this purring, churring sound that tells you, “Okay, they get it” and take your hand away. Not all batches need this - I can’t recall that any of mine did - but chicks stressed from shipping or those from feed stores where they’ve been under a heat lamp with many more roommates sometimes do.
@Little Farm Girl, tell her she’s got this! No matter what method she chooses to use, steady, gentle heat, a lot of cooler area to wander around in (because they need that too) fresh water and food and the rest is just keeping them safe and clean will giver the best results. If she opts for a heat lamp because she’s used to that, then have her secure the heck out of it, and have it just in one spot so they can go out of it when they want. For brooder plates, follow the instructions that came with it, and for MHP we have a thread for that. And we’re always here to help, again, regardless of how she chooses to do things there will be someone (or many someones) with experience. And sad as it is, losing a chick here and there isn't unusual, nor should it necessarily be a time to rip everything apart and stress her or the chicks out by changing things all around UNLESS it’s obvious what the problem is. Chicks sometimes die....I once lost almost an entire shipment of Silkies for no reason that I ever found. I’m sure
@aart remembers that fiasco. We ask a lot from those tiny, fluffy babies, and sometimes their little bodies just can’t handle it all.