
I recently went through this as a scare with my 14 1/2 yr old lab... so I know the heartbreak. The only thing that I ever found that fills part of the void is a new pet. Does he like either of your other 2 dogs, maybe you could loan him one to keep him company until he decides about getting a new dog?
I suggest keeping track of him.. and as difficult as it is with men... share out loud how horribly sad this is... though you all knew it would come one day?
Sometimes also the loss of a pet reminds us that life does end. Reviewing our own mortality comes into the picture at that point.

The grief process includes several stages...help him talk through all of them as they come and go... and encourage him to NOT drink at this time of sadness... maybe by being open about it will help give him strength? TC