In the episode "Long in the Teeth", in the end, Daggett is referring to the bear that was crowing like a rooster midway through the episode. He exclaims "Norbert, what is wrong with that bear?"
Both the squirrel, and the gopher, are voiced by Carlos Alazraqui, who previously worked with Mitch Schauer on Rocko's Modern Life as the voice of Rocko. Mitch Schauer also worked as an assistant storyboard artist on Rocko's Modern Life.