The Dog Dimension is a universe in which the population is made entirely of intelligent dogs.
This dimension is never seen, but was mentioned in "Lawnmower Dog". Snuffles and his compatriots colonized this dimension after Snuffles realizes that taking over Earth was a mistake due to Rick Sanchez and Morty Smith's inception maneuver. Before leaving, Snuffles and Morty say goodbye. It was later seen in the Rick and Morty Season 2 promo when Rick, Morty, and Summer were traveling through different bathrooms across different realities.
- The dimension is a direct allusion to Dog World
- It possibly made its first appearance in the Rick and Morty Season 2 promo, The Right Bathroom.