I was brushing my dog Dodge the other day and I discovered what I think is a fatty tumor on the back of his rear leg. I think it was the same one before I found but I forgot about it as I was going through a lengthy illness with my cat. It is about the size of a small baseball now. I did some research on the internet and I am sure it is a fatty tumor. This tumor doesn't seem to affect him as he is active and etc. They say they are common in older dogs and Dodge is 11 years old. I was wondering if anyone here has had to deal with this and what is the usual cost of removal? The info I have read said if it is benign that it should be no problem left alone unless if interfers with the pets activity. This lump is not hard but soft. Thank you for any info.