My almost 2 year old RIR is sick. Her tail has been down for 3 days, belly swollen and vent seems to be pumping. Poop started out as watery. Isolated her indoors. Yesterday, I soaked her in warm water for about 10 mins and after a rest, inspected for egg binding. While poop squirted out with each inspection, one time there was an almost liquid fleshy substance that came out. Done a few warm water soaks and no change. She's eating baby oatmeal with crushed oyster shells and cheese pieces. She's drinking water and comb is slightly pale. Poop then turned white and not runny, but still waddling like a penguin and just sits back down. Any suggestions to try at home? I have not wormed chickens and live in Vermont. It has been very warm and then we've finally started to have a northeast winter with temps in the teens. I have a heat lamp in my coop as it is usually below 32 and chickens prefer to stay in coop.