I'm so disloyal, I haven't been on the forum for ages, but I have a chicken emergency!!! One of my hens seems to have red mites. I've dusted her with powder 3 times so far, and this weekend I will scrub the henhouse out with poultry shield. But I'm worried about the state of my hen - she is very down in the dumps, has spent the whole day sitting down, and when she has tried to walk she just doesn't seem to be able to manage it - her legs give way under her. I've checked her everywhere and I can't see any other kind of injury - her legs don't seem to be broken in any way, nor are they cut. Her vent is fairly clean although when she does poo it is very runny. Is it normal for a hen with red mites to get so run down that she can't even walk?? And how long will it take with regular red mite powder to see an improvement in her?
I'm about to go out and check on her as I don't think she would even have been able to hobble to bed, so I'll pick her up and try to make her comfy somewhere. I'm really worried she might die in the next day or two

Does this all sound normal for a red mite infestation? Will my chicken get better? I've not had this before.
Thanks for any help!!!