I'm so sorry for you and the wife's loss . . . I cried . . . I have a 13+ year old australian shephard he will be 14 in November . . . right now he is still active but sleeps a lot and is getting hard of hearing he has a lot of land to roam on, I worry now that he will just take a walk and not come back . . . again I am very sorry for you and your's loss.
He won't. Some breeds just want to go away and suffer alone, but dogs like mine and yours want our companionship and trust us to do what's best for them.