My 7 year old mixed breed only lived 20 days from 1st day of start on his CCNU chemo cancer treatment. I was told he had a possible blood clot in one of his lungs and to give him Plavix. My Sparky was breathing very fast. When I returned home from the Oncologist appointment (she administered his 2nd CCNU treatment)... He died in his crate a few house later. There is no mention of blood clots on the CCNU website. I'm heartbroken and need to know why he died.