One of my hens is just laying down in the corner. She will let me pick her up with no protest. Didn't feel an egg inside, BUT found her crop to be severely swollen. It is huge like a water balloon, It's soft and movable. The others have regular sized ones I guess, and can feel grain or food inside them. She is laying with her tail feathers turned down. These hens are about 7 months old and have just begun laying. Shes inside the coop just sitting on the floor now and the other girls come over to check her and make little clucks. I've already taken 1 dog to the vet 3 times in a week and can't afford another trip! What can I do?