We adopted Gwen as a rescue in 2003 and in 2006 we found a small bump on her side belly – had it removed and nothing since then. One Friday night in January 2013 we found a huge lump on her belly the size of a baseball, bright red and tender. emergency trip to the vet to find out she had 4 mast cell tumors and four groups of fat cells. Ultrasound and chest x-ray were clear. Treated with Predesone shrunk two to nothing but surgically removed the other two. 8 rounds of chemo and rough spring and she is tumor free and happy. She has aged a bit from the ordeal but she is about 10 years old and starting to slow down. Gwen is my girl and still always by my side hopefully for a few more cancer free years.