About five days ago I noticed my Cuckoo Maran (aprox. 6 months old - not laying yet) limping pretty good on her left leg. I looked her over could see no sign of bumble foot, mites, scales, or any apparent injury. Assuming it was just a strain, I just monitored her for the first two days. By the third day, I noticed she was staying under or in the coop most of the day, still no sign of injury or bumble foot etc. (we have no high roosts, rocks or rough terrain), so I kept her in the coop/run during the free range time to keep her from too much activity. She seems to be eating/drinking fine, and will stand on the foot, but often keeps it tucked up under. This morning when I went out to feed/water the chickens (I have six) I noticed a creamy colored discharge from her back side. This is the first sign of anything other than the foot, so I am really concerned. I brought her inside, washed her back side, removing all the discharge and put her in a dog kennel in our basement with bedding, water and food. While washing her vent area I noticed one area of her vent is red and swollen, but not bleeding. Attached are pictures of her from this morning, bearing weight on the leg (but still limping heavily), the discharge, two of her droppings from this morning, and the swollen vent. Also, it is about 40 degrees outside, and this is WI, will it do harm for me to keep her inside to monitor her more closely for a few days? She is fed organic laying feed, some scratch generally before nightfall (only about 1 to 1.5 cups thrown out for all six chickens), I just ran out of oyster shell, but generally they have a dish of it in their run, and of course fresh water daily, and some fruit and veg from kitchen scraps when I think of it (usually just grapes, tomatoes, apples and bananas). They free range generally about 2 hours a day, except when rainy. Any and all input would be really appreciated. This is my first sick chicken. Thank you!