The cowgirl is playing poker with rats! She has four aces, but wait, the rat is sitting on the fifth ace. What does that tell you about the deck of cards if there are five aces? What is the other rat doing? Ever heard of a 'hot foot'?
Much like his other commissioned work, this features a woman hopping and holding their foot in pain, which is usually perpetrated by his mouse character (I don't know his name). Said woman in question is the Chimpette, who is merely minding her own business as the mouse does the old matches-between-toes prank that was prevalent in Tom and Jerry cartoons. Unlike those however, this is completely unprovoked. Good thing the Chimpette's feet are durable, but unfortunately her pain and sensitivity tolerance is extremely low in compensation.