Dead dogs and cats in dog and cat food?

My cat was just diagnosed with kidney disease and when doing research for the causes I came across shocking info on what goes into commercial dog and cat food. If the can or bag states "meat & bone meal" it can and usually does contain euthanized dogs, cats, farm animals, zoo animals and even road kill as well as the collars, tags, bags they were placed in and the euthanasia drugs used to kill them. If you don't believe me, do your own research! I am shocked beyond words and want to spread info to as many pet owners as possible!