We have a 2 year old Rhode Island Red named Caramel who about 12 weeks ago started waddling around like a penguin. She continued to eat normally and in the last week started laying again. The shells on the eggs appear to be strong, but they are enlongated. We've had to keep her separated from the other chickens to keep her safe but we can't reintroduce her until she is able to fly up onto the roost. Her abdomen feels soft to the touch and there are no noticeable lumps. Any ideas?