"The Mad Dog" begins with Mickey giving Pluto a bath. However, Pluto is a bad dog and fights from getting bathed. In fact, he's so bad that he eats the bar of soap. Then, when he runs away, folks think he has rabies and begin to panic. When the dog catcher (Pete) arrives, he pulls out a gun and tries repeatedly to shoot the mutt. Thankfully, Mickey is eventually able to calm everyone down and takes Pluto back home to finish the bath.
This is an odd cartoon and one I liked, but have reservations that keep me from enthusiastically recommending it. On one hand, it's very well animated and quite clever--so there's a lot to enjoy. But, on the other, it's a very dark idea for a story if you think about it--rabies and putting down a dog suspected of having this terrible disease!! This might upset small kids but otherwise it's worth seeing, though dark...dreadfully dark.