I think something is wrong with it. It froze or got too hot or something. I dipped all the chickens and then basically took some permethrin in the palm of my hand and rubbed it on the vent areas of the two worst affected hens (while they were in the sink in a bath of the solution for the second time yesterday). It was definitely a higher concentration.You could try a higher dose.
Well, everyone still has living mites. More than 24 hours later. Looks like it helped a little on the ones most affected - but they also got two “baths” so maybe some of them just drowned.
I have elector psp on the way from Amazon. Hopefully my two worse off can wait another day. Should be here tomorrow.
Now to convince my husband that having bird feeders in the back yard on the hen house is a bad idea.