Not much argument about the Ph of human stomach acid, as it's a fairly strong hydrochloric acid soup. Without the thick layer of protective mucous lining the stomach, it would literally eat through flesh.

As to the relation with wolves, yes, they are, but a wolf in the wild lives 8-10 years. Frankly I'd like to keep Lady around a little longer than that.

Salmonella poisoning certainly happens in dogs, and if "most" dog food contained salmonella vets would be making a lot more money with the frequent visits resulting from illnesses.