These signs are not special or official. They are not from a book of signs. They are simply ones made up to use with my deaf dog Berkeley.
For more information about living with and training a deaf dog, please see Deaf Dogs.
Deaf Dog Hand Signs
This is only a very small sample. You can add to them and adapt them in whatever way you like. The main thing to bear in mind is that whatever signs you choose you must be consistent. Make a note of the signs you intend to use and maybe draw or photograph them. Put them on the fridge door or somewhere easy to view and stick to those signs.