Is It Really DOG FOOD?

This vintage 1943 advertisement, found on R1 car 381, seems like an innocent ad for dog food. There are so many references to this being for dogs.

• The emphasis on the word Dog on the bag
• The drawing of a dog on the bag
• The word DOG on the bowl
• The dog apparently eating from the bowl
• The tag line, Give your Dog his daily vitamins
• The expanded name, Gaines Complete Dog Food

Then, there's something startling in the first bullet point: Used by U. S. Army.

Don't tell me they were feeding Dog Food to those soldiers!