Pet advice....please...?

could anyone give their opinion on how to deal with the loss of a beloved pet. (dog). Couple gave 15 years total devotion to a shaggy mutt, and they are heartbroken. I think but without experience that they could in time give a loving home to another dog. They say they couldnt. Anyone ever in a similar situation and could give me advice to p on. (said couple not computer literate)