Tonight I found one of my hens lying on the floor of the coop. When i picked her up she just froze and i could hear growling, swishing noises coming from her stomach? Then she just urinated. No poop just urine. I put her in a cat carrier and took her inside the house Then she urinated more in the box. I noticed this urinating thing in one of the other chickens and I wormed them but still happening. Also this hen has been really thin to begin with since we got her from the RSPCA with our other hen and rooster. She never gained any weight and her feathers have always been rough and brittle looking. What could be wrong with her?