There was this yellow toad hopping down a path in the woods. He was feeling really sick and had such a terrible cough he though he might croak. Anyway, he came upon a man who, it turns out, was a doctor. He diagnosed the frogs illness right away, but, alas, he found he was not carrying the medicine with him that the frog required.
The doctor pointed down the path toward a distant hill. "Toad", he said, "if you can hop down past that hill you will find a village where my office is located. Take this prescription with you and tell the druggist to give you what you need." The toad thanked the doctor and started on his journey.

A few hours later, the doctor came upon a bunny , hopping through the woods. "And how are you today, Mr. Rabbit?" said the doctor.
"Not so good," came the reply. "I hopped on a thorn a few miles back and my foot is starting to swell." The doctor looked at the rabbit's limb and applied a temporary bandage. "You need to see my nurse who will give you a better dressing and make you well again."
"Oh thank you!" said the rabbit. "Which way do I go to find your office?"

With that, the doctor pointed toward the distant hill and said "Follow the yellow sick toad."