Abstract: A pet shelter/incubator includes a hollow housing having an interior sufficiently large to comfortably receive at least one dog, a floor, a roof and at least one side wall extending between the floor and the roof and only partially surrounding the interior. It also includes at least one heat generator positioned within the housing to radiate into the interior and a sensor that is responsive to the presence and absence of an animal in the interior of the housing turn the heat generator on in the presence of the animal and off in its absence. The roof is removably mounted to the side wall and floor to convert the shelter into an incubator for newborn and young animals with a rigid closure to cover a door opening.