Curiously, source of that muscle dog?

I don't think the dog man here is supposed to be someone specific, it's just the dog that always steals her bread, drawn as a monster for the sake of lewdness. The dog in the show doesn't have a name.

Yeah I watched this. But I mean, lately I see this Shiba Inu with muscle almost everywhere in Twitter I suspected it to be Japanese meme specifically. Not this dog from Gabriel dropout.