I have also read about Solid Gold pet food where a woman was arrested for injecting meds that treat diseases into the foods in 1988.

Sort of reminds me in an odd way of a story back in the 60s about a family hamburger joint in Cincinnati. The patrons just raved about the hamburgers being served. It was the juiciest and tastiest hamburgers they had ever eaten. Later the city health inspector closed them down. Seems part of that delicious hamburger was canned Horse meat. The point: By your logic one would have to conclude that Mc Donald hamburgers were also made out of horse meat. After all if one hamburger operation in the world did it, they must all be doing it. Or if it occurred in one dog food then it must be a danger for all. Guilt by association.

Guess where all of those cats & dogs go after being euthanized? They are being produced in pet food! How disgusting is that?

You do realize AAFCO regulations allow only by-products of human food processing to be in pet food? If so then applying logic, we arrive at the conclusion euthanized cats and dogs are in the human food supply chain.

Kidney Cancer
Bladder Cancer
Skin Cancer
Stomach Cancer
Spleen Cancer
Leukemia

Well I'll give you credit for 1 out of 6. Leukemia is a cancer. The phrase skin cancer means nothing as that could be basal cell, melanoma, etc. Here's a hint for you on canine cancer: Genetics! If you have a Golden Retriever you could feed it rib eye steak, caviar, or any other human food you wanted. The chances are extremely high that by the age of 10 it will have hemangiosarcoma or lymphoma. Neither will feeding it the latest and greatest fad diet have any outcome on the course of the cancer.

If you can provide any links in scientific journals that show a strong connection between commercial dog food (even the crappy brands) and canine cancer then do post them. Note the words scientific journals. That leaves out sites trying to scare sell the latest dog food fads, or some testimonial by someone on the web.