Bart, I'm verry sorry to hear that. I'm not sure how many on the net will be able to relate but we went through this 3 years ago. Calvin was a 20 pound dog chasing Manx with a personality of a raccoon. I was touched by your e-mail cause it brought back some fond memories.... Calvin died of lukemia, even though he had had all his anti-lukemia shots. :( Carl DeSousa