Can I keep an adult with a kid?

First, yes you can have a mixed herd of horns and disbudded/polled.
That said,
No, it’s not a good idea to put the adult doe right in with the kids. I would separate the doe for 30 days for bio security’s sake then introduce them in pens next to each other where they can sniff but not ram each other. After a week or so you can do supervised visits until you learn how she’s going to act with them.
good luck.

Do you have a way to separate an area to quarantine the doe for 30 days? Those kids have not built up a strong immunity yet and would be susceptible to picking up anything the doe brought with her. Worm load is one example, not all farms carry the same worm load or individual resistance. Stress from moving can cause a bloom in worms, so a fecal count would be helpful soon after she arrives.

NigerianNewbie said:

Do you have a way to separate an area to quarantine the doe for 30 days? Those kids have not built up a strong immunity yet and would be susceptible to picking up anything the doe brought with her. Worm load is one example, not all farms carry the same worm load or individual resistance. Stress from moving can cause a bloom in worms, so a fecal count would be helpful soon after she arrives.

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The only other room I have is the milk room, which has the milk stand in it. Do you think it would be okay to make that a comfortable spot for her until then? I feel so silly for not planning ahead and only now asking, my bad. It’s a big enough room, but not insulated and it’s currently snowing out. Not sure if that’s something I should be concerned about.

I think I would create an area for her ASAP where she has access to shelter and outdoors. Either arrange to delay pickup or have her in the milkroom while you fence off a section for her. At this point weatherwise the shelter doesn’t need to be insulated.
Even if you disregard bio security, they shouldn’t be thrown together right away, due to the size difference. The kids might get hurt.

Kaitlyn said:

The only other room I have is the milk room, which has the milk stand in it. Do you think it would be okay to make that a comfortable spot for her until then? I feel so silly for not planning ahead and only now asking, my bad. It’s a big enough room, but not insulated and it’s currently snowing out. Not sure if that’s something I should be concerned about.

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I would not would keep her confined in a milk room for even a few days and 30 days in confinement without being allowed outdoors and isolated would be extremely stressful added on top of the stress from a move. Is there a way to divide your current pasture to separate her from the kids and add some type of shelter for her? She will need to have periods of supervised visits with the kids for a while to make sure she behaves around them whether or not you put her in quarantine

I agree.

NigerianNewbie said:

I would not would keep her confined in a milk room for even a few days and 30 days in confinement without being allowed outdoors and isolated would be extremely stressful added on top of the stress from a move. Is there a way to divide your current pasture to separate her from the kids and add some type of shelter for her? She will need to have periods of supervised visits with the kids for a while to make sure she behaves around them whether or not you put her in quarantine

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Oh, I wasn’t planning on keeping her there the entire time! I’d definitely allow her outside. I mostly meant just for the time being for her to sleep during the night. Thank you all for the great advice though!

How are things going with the new addition to the herd?

They have that portable electric fencing. When I first got my girls, I got it cause I was thinking I'd rotate the acre pasture or something. They didn't take to using all the pasture for a year or so and I've never had cause to use it. But I still have it in the wrapping it came in, just for when I need it. Maybe see about getting one of them, to allow her free access but keep them separated? I have a strand on the top of the fence and once they got shocked once or twice, that was it. Good luck!