Are you a dog lover ?
Is he your best buddy ?
Here is an example:
I get the feeling this lady loves her pup and her pup loves her and they have joyful wishes for those they send their cards to.
Then make him part of your holiday celebration by putting their photo on you holiday greeting cards.
You might think about dressing up your dog up for the occasion. Make if fun for both of you and show how you care for each other.