Once upon a time, there was a big yellow dog. The dog liked to help his friends. He would supply them with things they needed. One day, his friend, a small cat, needed help to move a big weight.
The yellow dog was happy to help. He went to the cat's house. The cat showed him the big weight. The dog tried to move the weight. He pushed and pushed. The weight started to move.
Then, something unexpected happened. The big weight fell on the dog's tail. The dog was sad and his tail hurt. The cat was sorry, but the dog could not help anymore. The big weight was still there and the yellow dog went home with a hurt tail.
