if tissue is pooping out of her vent(the spot were the eggs come from) then she has a prolaspe, not good, she needs to be separated from the other hens asap, they will peck at the tissue and kill her. Wash the tissue with warm water and then apply either sugar, honey or prep H to the tissue, give it a few minutes this helps to reduce the swelling, then with a gloved finger(at least a claen finger with some lub on it) gently push the tissue back in, you may have to do this several times. keep her from laying for a while by keeping her in a darken area to stop egg production. you can look up prolaspe vent here in the search engine for more info. act soon and good luck