Big Dog is one of the main dogs in the show. He doesn't talk a lot and his eyes aren't shown a lot. He is friends with Little Dog. Big Dog is a large grey Old English Sheepdog. He is voiced by Brad Garrett.
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Big Dog is a large grey Old English Sheepdog (in an episode where they were in a farm, he was even able to herd sheep). He is much stronger than the Little Dog. The Big Dog is generally too lazy to bother with anything, and most of the time seemed more aloof and unconcerned about his surroundings than actually stupid.
In some episodes, he surprisingly revealed deep philosophical intelligence. A running gag about the Big Dog is he would spit out a whole cob of corn he ate. In the episode Love, his name is revealed to be "Jonathan". In Space Dogs he loves pushing buttons.