Welcome to the hatching adventure. I understand how nerve wracking it can be your first time, either with a broody hen or with an incubator. It does get less worrying after you've been through it a time or two.
I'll start by saying with living animals you do not get guarantees with their behaviors. We can tell you what we've seen and what we expect, but I sure cannot guarantee that you will see what I've seen. Each time can be different. Chickens have been going broody and raising chicks since long before humans ever domesticated them. The majority still have those instincts but like humans you can get one that is just not wired correctly. I trust my broody hens to know what they are doing and I'm almost never disappointed. That does not mean I've never had a problem, just that problems are rare.
Before a pullet or hen starts laying she puts on excess fat, mostly stored in her abdomen. I've butchered pullets, hens, cockerels, and roosters and this difference is extremely clear. That excess fat is what hens mostly live off of when they go broody so they can spend time on the nest taking care of the eggs instead of having to spend a lot of time looking for food and water. Broodies can lose weight and size while broody, but that's fat put there for that purpose. Some people see that and think "She's starving herself to death" when she's really not.
I've had broody hens leave the nest twice a day and spend more than 1 hour off of the nest each time. I've had a broody leave the nest every morning for 15 minutes and that's it. I've had broody hens I've never seen off of the nest but I know they are coming off since they are not pooping in the nest. When a hen comes off she usually eats, drinks, and poops. She may take a dust bath. I don't worry about whether a broody is coming off or not as long as she is not pooping is a nest. I can't say it cannot happen but I typically have 3 or 4 broody hens hatch eggs every year and I've never had one poop in the nest. Many people like to put food and water in with the broody so she never has to leave but I don't. I leave food and water where it normally is. I don't want to confuse her.
There is nothing wrong with removing a broody hen every day if you want to. If you take her off of the nest and set her down on the coop floor she will probably set there for a few seconds and then either leave to eat, drink, and poop or she will move back to the nest. When she is ready she will return to her nest. My broody hens hatch with the flock so I need to check under them every day after they have laid to see if they laid an egg in with her clutch so that is a good time to take the broody off. I don't always take them off but I sometimes do when I check. Since you do not have any other hens with her you don't need to do that.
This hen will be in a coop and run with a rooster and no other chickens. Some people on this forum will freak out because a rooster is in with the hen and eggs. Not me. I don't know what you will see with your hen and rooster. He may totally leave her alone. There is even a slight possibility he will be a problem, remember I can't give guarantees on behaviors. What I expect to see is that the rooster will keep the hen company, at least part of the time. He may even set on the nest to help her incubate the eggs since there are no other hens to occupy his time. When the chicks hatch he will probably help the hen take care of them. I'd be comfortable leaving them in together.
When did you start the eggs in the incubator relative to when you put the two under the hen? If you started them all the same day you have a lot of options. If you started them on different days you are more limited. How many eggs did you put in the incubator? I'll save myself a lot of typing until I get your response.
Since you have these two separated form the rest of your flock, make sure chicks cannot get out of the coop/pen the hen and rooster are in and in with the rest of the flock. If the chicks get in with the others without the hen to protect them that may be killed. It does not happen each time but it has happened to me.
I think those are the highlights. Good luck!
I'll start by saying with living animals you do not get guarantees with their behaviors. We can tell you what we've seen and what we expect, but I sure cannot guarantee that you will see what I've seen. Each time can be different. Chickens have been going broody and raising chicks since long before humans ever domesticated them. The majority still have those instincts but like humans you can get one that is just not wired correctly. I trust my broody hens to know what they are doing and I'm almost never disappointed. That does not mean I've never had a problem, just that problems are rare.
Before a pullet or hen starts laying she puts on excess fat, mostly stored in her abdomen. I've butchered pullets, hens, cockerels, and roosters and this difference is extremely clear. That excess fat is what hens mostly live off of when they go broody so they can spend time on the nest taking care of the eggs instead of having to spend a lot of time looking for food and water. Broodies can lose weight and size while broody, but that's fat put there for that purpose. Some people see that and think "She's starving herself to death" when she's really not.
I've had broody hens leave the nest twice a day and spend more than 1 hour off of the nest each time. I've had a broody leave the nest every morning for 15 minutes and that's it. I've had broody hens I've never seen off of the nest but I know they are coming off since they are not pooping in the nest. When a hen comes off she usually eats, drinks, and poops. She may take a dust bath. I don't worry about whether a broody is coming off or not as long as she is not pooping is a nest. I can't say it cannot happen but I typically have 3 or 4 broody hens hatch eggs every year and I've never had one poop in the nest. Many people like to put food and water in with the broody so she never has to leave but I don't. I leave food and water where it normally is. I don't want to confuse her.
There is nothing wrong with removing a broody hen every day if you want to. If you take her off of the nest and set her down on the coop floor she will probably set there for a few seconds and then either leave to eat, drink, and poop or she will move back to the nest. When she is ready she will return to her nest. My broody hens hatch with the flock so I need to check under them every day after they have laid to see if they laid an egg in with her clutch so that is a good time to take the broody off. I don't always take them off but I sometimes do when I check. Since you do not have any other hens with her you don't need to do that.
This hen will be in a coop and run with a rooster and no other chickens. Some people on this forum will freak out because a rooster is in with the hen and eggs. Not me. I don't know what you will see with your hen and rooster. He may totally leave her alone. There is even a slight possibility he will be a problem, remember I can't give guarantees on behaviors. What I expect to see is that the rooster will keep the hen company, at least part of the time. He may even set on the nest to help her incubate the eggs since there are no other hens to occupy his time. When the chicks hatch he will probably help the hen take care of them. I'd be comfortable leaving them in together.
When did you start the eggs in the incubator relative to when you put the two under the hen? If you started them all the same day you have a lot of options. If you started them on different days you are more limited. How many eggs did you put in the incubator? I'll save myself a lot of typing until I get your response.
Since you have these two separated form the rest of your flock, make sure chicks cannot get out of the coop/pen the hen and rooster are in and in with the rest of the flock. If the chicks get in with the others without the hen to protect them that may be killed. It does not happen each time but it has happened to me.
I think those are the highlights. Good luck!
