I had Jackson groomed by a person who came to my house (I switched to her because of concern about canine flu). Everything went well and she did a good job. A few days later I felt a small hard lump ( about the size of a pencil eraser) on his chest about 2 inches below his Adam's apple. Then just yesterday I felt another one on the top of his head! At first it looked like dirt (grayish specks in the fur) and I tried to scratch it off but it seems firmly attached to his head! Has anyone ever encountered this?