So you obviously prefer to put fertile eggs under her as opposed to placing already hatched baby chicks under her. Should I have a brooder close by for the chicks? Separate from the main coop where Mom is? Or just leave them in the coop with Mom (since we have only ONE hen now).
No, I don’t prefer fertile eggs. I don’t have a preference for you one way or the other. If you can find very young chicks to slip under her, that would be great. Mountains Peeps had discussed that. I was just giving information on the other option you had asked about.
If you can find chicks, get them as young as you can. Hens and chicks imprint on each other. The older the chicks, the less likely they are to imprint. Many feed stores are having chick days, you might find some there, though many have a minimum number they will sell you, usually 6. Or if you can find your state thread in the “Where am I? Where are you!” section on this forum, you can discuss with your fellow Texans about getting baby chicks. Someone near you may be able to help you.
Most broodies will accept and take care of young chicks if you slip them under her at night. On rare occasions a hen won’t do that though, even if you do everything right. So you need to be prepared to brood them yourself if she does not accept them.
If the hen accepts them, and she probably will if they are young, you do not need to do anything except stay out of the way. Let the broody take care of her babies. You do not need to provide a brooder. You do not need to provide heat. The only thing you need to provide is food and water on a level the chicks can get to. The broody hen will take care of everything else.
Should I have heat lamp on in coop for the chicks? Even with weather here in Dallas will be 70-80's during day/50-60's at night? And if heat lamp is on for the chicks, can I leave the fan on for the adult hen/mom in the same coop?! :/
With those temperatures, you do not need to provide heat. The hen’s body temperature is 100 degrees. She can provide all the heat the chicks need. With those temperatures you don’t need the fan for the hen either.
since you can't tell a chicks sex until weeks later, what if we end up with 1 male (roost) & 1 hen chick? Will roosters fertilize eggs often? We only have room for 3-5 chickens right now, total.
Once they mature roosters will fertilize the eggs. Those eggs can still be eaten. They will not hatch unless they are incubated, either by a broody hen or in an incubator. If you don’t want more chicks, don’t incubate the eggs.