What was tin dog called in french?

There isn't a direct French equivalent for "tin dog" as it's a specific American slang term. However, depending on the context, some possible translations could be:

* "Chien en fer-blanc" - This literally translates to "tin dog" and would be understood by French speakers, but it's not a common phrase.

* "Chien de fer" - This means "iron dog" and might be used if the context implies a dog made of metal.

* "Chien en métal" - This means "metal dog" and is a more general term that could be used to describe any dog made of metal.

If you can provide more context about what "tin dog" refers to, I might be able to give you a more accurate translation.