I have a dilemma and a big problem (mites) our bantam frizzle hen went broody and we set her to start nesting on May 31st, Saturday, May 20th she hatched a baby chick in the morning and I thought the hatching party will begin. I left her alone but made sure she had her chick starter food and water. I checked on her at midnight (Sunday) and noticed she had moved all her eggs to a different corner and didn't see the chick, I thought she was covering it. Sunday morning comes and she's not under her eggs (she got up to poop) but was making a weird noise, I then noticed her baby chick was dead, it looked smashed
I removed the dead chick and put her back under her eggs, but notice all these little crawling things on her and in the water, I changed her water and we buried the baby chick. I did research and it looks like they're mites and they're parasites so I do not want them to feast on her especially since she's not moving and not getting sun. I've left her under her eggs hoping they'll hatch, but I keep checking on her and it doesn't like anything will hatch anymore, we did candle lit her eggs on day 10 and 5 out of 13 eggs seemed
to be developing an embryo. I don't know what happened, but I can suspect, when the baby chick hatched, she was not fully under her eggs for a whole day ( I have a photo to show)
and also she did move all her eggs from one end to the other end of the box. At this point I would like ton know if I should allow her to remain under her eggs? I feel bad for her because it looks like she's really expecting those eggs to hatch, however, those mites are feasting on her and she's looking worse by the day. I did dusted her with Diatomaceous Earth yesterday just to soothe her a bit. The other thing I was thinking about was finding out if a local feed store in the Los Angeles area has baby chicks, if that's the case I was thinking maybe we can get some and put them under her at night and remove the eggs. I don't know if it's a good idea at all because then they will also get infested with mites. What should I do?

to be developing an embryo. I don't know what happened, but I can suspect, when the baby chick hatched, she was not fully under her eggs for a whole day ( I have a photo to show)