'murica!

There is something terribly wrong with this world.

Those titanium fangs that equip the dogs are so powerful that dogs wearing these can chew through STEEL. Fact

Imagine if they got rabies. . . . They'd be indestructible.

Nope, these are only replacement teeth if one is broken off. The equivalent to a crown for broken human teeth.
http://www.wired.com/dangerroom/2011/05/no-navy-seal-dogs-dont-have-titanium-teeth/

A titanium fang is weaker than the rest of the teeth speaking as how it is seated in the gums. They are only used when a dog breaks a tooth. They should be felt sorry for, not used as propaganda like some new bionic dog. That's a German Shepherd in the photo by the way.