Last year, three of my cats had to be put to sleep because of health issues. I also lost my two dogs. Two of the cats were 16+ years old. One dog was 15 years old, and the other had diabetes with multiple complications. But, other than the dog with diabetes, I really had not expected to lose any of them much less one after another. Renal failure, congestive heart disease, cancer were the varying causes identified by our vet. But, I then and now wonder about poisoning of some sort. To have them crash as they did made no sense to me. I know that I have not come to grips with losing them so maybe I am just looking for answers that are not to be found. Any info out there about earlier pet deaths that just did not makes sense? It is now clear that the melamine has been in the pet food for a long time. Was it causing earlier deaths that did not get identified until recently?