Arthur, Brain, and Buster discuss why Mr. Ratburn has been acting strange. Arthur, Brain, and Buster have noticed that Mr. Ratburn has been acting strange. What could be the cause of his odd behavior?

Mr. Ratburn isn't acting like himself./Muffy fears Bailey may be replaced! Arthur, Buster, and Brain are worried when Mr. Ratburn isn’t acting like himself. He’s always pleased to see them...so what ...