Living as a blind person without regular visual help, I was very grateful for photos of the dog and myself I could confidently display to others whilst knowing in detail what was in the picture.

I would suggest a tactile picture that she could feel of either her pup or her pup and her. With an engraving with her dogs name on it. That would probably be better than a pendant with a picture she can't see.

Maybe a video of them together, you could describe what each scene is at it comes up. Think audio description. She could put that on when she's feeling sad.

Or a treasure chest engraved with something special that she could feel.