snowball/snuffles

Snowball/Snuffles was the dog of Morty in series 1 episode 2 of Rick and Morty,

Jerry gets frustrated at him once he pees on the rug, so he blackmails Rick into making him a machine that increases Snuffle/Snowball's intelligence, he eventually gains control of the household while Rick and Morty are venturing, and Rick tricks him so he and his dog friends enter a world populated only by dogs.
Snowball/Snuffles is a white animated dog who exists only inside Rik and Morty.

"Where are my testicles Summer?"

Snowball/Snuffles was an animated dog in season 1 episode 2 of Rick and Morty.