So my son noticed one of our older hens had a very fat foot. He brought her into me and it doesnt look like bumble. The bottom is dirty from having more surface touching the ground where she walks but it doesnt seem to have a scab or sore on it anywhere. There is just a lot of edema and swelling everything is soft and squishy. I really have no clue what it could be other than arthritis? He says she is walking fine but she complains a little when I squeeze it.