Mites / lice would not cause her poo to be like that , looking at her eye, it looks droopy, and her face looks swollen...
Feel her breast bone , Is the bone sticking out like a handle ? or is there a lot of meat on both sides ?
If the bone is sticking out greatly, she is emaciated... it is not normal for chickens to pass only urates.. chickens pee white urates... usually on top of a normal brown firm poo, looking like a white cap..
is her breathing laboured, does she pant , sneeze ,cough, have any rattly breath , mucous coming from the nose ? this would indicate a respiratory condition.. (bear in mind chickens hide when they are sick to prevent being ousted by the flock and to avoid attracting predators, so if you are holding her , she may breathe differently than if you are standing near listening quietly ..)
Check her crop, it should feel full at roost time, with no food overnight, and before you check her , first thing in the morning , the crop should be emptied out , if not she coud be crop bound ...
She could be just emaciated from being overloaded with worms , they will drag her down and with the lice and mites they can kill her ... worms feed off what they have eaten , stealing nutrition..
why don't you take a poop sample to the vet for testing ! get a really fresh one and put it into a ziploc bac, and have the vet do a fecal float test, should be only a minimum charge, they can test for a Respiratory infection , E-coli , parasites ,and cocci... this way you would know exactly what you are dealing with ,
to get rid of mites in the poultry house, completely empty it out of all shavings, strip it down, spray Sevin or Pemethrin into all the cracks ,and replace the bedding with pine shavings when it's all dry,, put a a table spoon size amount of Sevin 5% powder into the shavings in the nest boxes , ansd a alittle into the floor shavings . IF the chickens have mites living ON them near the vent area, you will have to treat all individual birds.. Approved for poultry, is sevin5% dust , Peremethrin dust , or spray, diluted...
Re- powder all the birds in 7 to 10 days with the Sevin... one pound of powder treats 100 birds, so I use about a half shot glass sized amount of powder per bird.. wear a dust mask to avoid inhaling the powder, get it up under the vent area some on the back and a little under each wing, then fluff it all down to the skin. Do not let the powder drift into their feed or water containers...
There is no egg withholding time for 1 application of Sevin, but you should refrain from eating the bird for 7 days...
