I have an older large dog. He has several lumps around his body - the vet just said they're warts, and wasn't at all concerned about them. Some are under the skin, some grow raised and bare of hair (no skin discoloring.) Some are larger than others, none seem painful to the touch. Most are pretty small, a quarter inch in diameter, and he has maybe 8 of them. They are kind of firm, but still fleshy (to me, they feel like the swollen lymph node I once had on my neck.