My dog is a 12 1/2 year old Whippet. He was recently diagnosed with splenic hemangiosarcoma and fibrosarcoma (sp?). It has been one month since last Saturday since he had his spleen removed. He got one dose of chemo, but it was very toxic to him and nearly killed him, so he isn't getting any more. My mother thinks that he will die from the cancer spreading to his lungs, so I was wondering what the signs were.