My wedding photographer was featured in this book called "Wedding Dogs, a Celebration of Holy Muttromony", lol. I just thought the book looked super cute. What a nice idea that you are incorporating your dog into your wedding day. Take a look on Etsy maybe. You can probably have your dogs name or picture added to a lot of items. Maybe you could do a little paw print on something?
https://www.amazon.ca/Wedding-Dogs-Celebration-Holy-Muttrimony/dp/1594746311