I feel horrible.

[MrAdventure]

you gotta buy a cat so he has someone to run away with

first make sure your dog does not knowt aht you know he is planning to run away this might scare him

second make a knapsack for him full of things he likes and save it

third on the day when hes gonna leave (you can tell just watch his tail) surprise him with the knapsack and give him a hug (try not to cry too much you want to be strnog) then send him on his way

fourth hope he finds a cat on the way cats are pretty good at keeping dogs company

fifth never give up