I am very fond of doing things myself at home but I have found what I think is a tumor on my 7 year German Shepherd. And I would really appreciate some wise guidance!! It is on her side between the ribs and the skin down by her nipple. It’s about the size of a small marble and a perfect ball. I have not had it checked by a vet yet, and was wondering if there are any herbs that I should just start giving her or if I need to find out exactly what it is first? It seems to hurt her a little bit when I brush that side/area.