Dogs can learn Sign-language. I am sure it is a lot more difficult and you would need more patience because they would have to "see" you instead of "hear" you (which could be done a distance away) I would go online and do some research about this. I am sure there are ways to instantly distract a deaf dog and get their attention. Their senses to vibration and sight take over quite a bit more when deaf. Good luck and keep us posted.