We Lost a Hen...

I went to collect eggs today and found one of our hens dead in the corner under the roosts. I was going to do a necropsy, but didn't end up doing it because my mum was far too upset over it. I felt around her abdomen and it felt a lot like she may have layed internally.

Also, I dusted with Dri-Kill today and cleaned out the coop and dusted that as well. How often should I repeat the dusting after this time? I was thinking of cleaning out again on Sunday (I'm worming too) and dusting everyone/the coop as well as the run. I think we are confirmed on mites, mum said when she was cleaning out the coop she noticed tiny little brown bugs in the shavings. I have filled the nest boxes with shavings this time.

Is there anything else I should try, perhaps an oral that kills mites as well? I think I read somewhere there is an Ivermectin that does this, or am I totally losing it?

I'm also performing some bumblefoot procedures this weekend, I have manicure scissors, tweezers, and epsom salts. Is there anything else I need? I saw this stuff at the co-op this afternoon that was an anti-septic, should I purchase some of this to dowse their feet with?