Taxonomically brilliant humor right here! The meme plays on the extreme variability of rabbit ear sizes and hearing ability. On one end, we have the evolutionary marvel with satellite-dish ears that can detect a carrot being peeled three counties away. On the other end, that adorably round face with ears so small they might as well be decorative.
Fun fact: Rabbits (Oryctolagus cuniculus) can rotate those massive ears 270° independently to pinpoint sounds without moving their heads. Meanwhile, the stubby-eared variety is still trying to figure out if you said "treat" or "vet." Natural selection really said "let's experiment with the volume knob!"