A subtrope of Fridge Logic, in which the problems or situations presented by Too Dumb to Live, Idiot Ball, or Genre Blindness could have been solved by the presence of a dog.
That's right. A dog.
Zombie Apocalypse? Who do you think will smell them coming and warn you? Stalked by a Serial Killer? Guess what wouldn't let that guy into your house without at least giving you a heads up?
Dogs in Real [...] [tvtropes.org]