Need help! Have a 15 year old pit/lab mix that has something on top of his toe that looks exactly like this except his is a dark purplish color and the fir is gone. I talked to my vet and he is to old for surgery. I have been giving him turmeric and apply castor oil, but I haven't seen much changes a little improvement. He does not want to put weight on the foot. Because he is older I am trying to look for natural ways to help him. Advise please!!!! .