- Autores: Ana Domingos, Gustavo S. Sanchesseron, Joana Couto, Joana Ferrolho, Sandra Antunes
- Ano de Publicação: 2017
- Journal: Frontiers for young minds
- Link: http://kids.frontiersin.org/article/10.3389/frym.2017.00028
Once upon a time, in a backyard not very far from you, lived a dog named Rex with long fluffy and shiny hair. Rex really loved to play outside, especially with his best friend and owner Jack, a nine-year-old boy. On a perfect spring day, when it was not too cold or too hot, Jack and Rex went for a walk in a green park close by, and when they returned home Jack noticed that his loyal friend was very itchy and was scratching his ear a lot.