This is the last time we ever see Captain Slaughter.
The Three Wise Guys are a play of the Marx Brothers (Byron= Groucho Marx, Wolfie= Harpo Marx, and Fleeco= Chico Marx).
Captain Slaughter is the direct descendant of Slaughtar. They are both voiced by Peter Cullen.
This is the second time Cooler is seen without his jacket on at the end. it is revealed that he has a heart-shaped birthmark just before the scene fades to black. This means that Cooler is the Star Puppy, but it is never mentioned again for the remainder of the series. Also, in How to Found a Pound, Cooler did not have a heart-shaped birthmark on his back.