A friend of mine had a deaf Dalmatian, AND a boxer. The boxer was the first dog he had, and he subsequently adopted the Dalmatian as a puppy.
The boxer noticed that the Dally could not hear like him, and whenever there was action (like barking at the postman!!!), or something to see, he would run up to her and run around her, getting her to follow him.
It worked a treat, and he ALWAYS did it. She knew hand signals too ........... but they never really needed it when the dogs were outside as the boxer ALWAYS came when called, and she just followed him.
Foam, You already have a dog .......... and you never know it might react the same way to the deaf dog......... 
It is a HUGE responsibility ............. but good luck and well done on your pure heart.
M!
"No dog is born either vicious or friendly, but rather a blank slate that is moulded, for better or worse, by the owner."
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