Here's a good one. So I've been leaving some eggs in the nests to encourage broodies...one little neurotic hen I caught eating eggs , so i locked her in her own flat..after a week, she had her own little nest with five eggs, no shells, and seemed calmer, so I let her out. Tonight I went in to close up the coop and check on my broody Pepper directly below her, in another box was a huge snake! It was coiled in the box, gulping down eggs..wow,yuck! A two person job I got my husband to haul it out and then I went all broody on it. No remorse whatsoever...I could just imagine it gobbling up my chicks! So, moral of the story, the problem may not be what you think it is. I leave the coop open all day,and at night I'd say it's impossible to get in, so that snake slithered in broad daylight, and we (grandkids and me) have been in and out all week long....never saw it before today...I guess there will be no more eggs left out from now on.
The op with parasite problem - I had a close call with fleas that came in on new puppies, and didn't see them right away, I dipped the dogs and out sevin dust in the floor of the coop, and liberally in the dust bath spot and didn't have a problem. At the feed store I noticed it says on the label do not directly apply etc etc and I asked if people use it they said it's not made for it but people use it that way-wink nudge, it's a disclaimer. I posted on another site and immediately someone posted it's poison and never to use it....gotta say, I don't want pests on my animals, or me, and having lived in Florida, mention fleas to me and I'm squirming. It sometimes takes big guns to completely get rid of parasites, otherwise you battle every other month with them. Now, after a one time use I haven't had any infestation and all is well.
My broody heads for the dust bowl first thing on her break. If I had one confined I'd give her a big bowl of dirt as I do once the chicks are hatched and she's off the nest. Now I have a protective pen the broody can take her chicks out immediately if she wants, some just really like that dust.