My older Chicken named Miss lucky was getting her feet cleaned and treated for bumblefoot on one toe when we discovered two round lumps on her tailbone. She is molting so they were easy to see. She is about 10 years old and has been limping for a while.I thought it was arthritis. Now I'm not sure what these lumps are above her tailbone. They are about a half an inch round and a little soft but firm. Both are next to each other at the base of her tailbone. I plan on giving her an Epsom salt soak tomorrow for the bumblefoot anyway. Anything else I can do? Thanks