Animals in the classroom and focusing

I noticed that on the days when Oliver comes I children are more likely to focus on their work. They try to move around the classroom with more caution and keep the noise level down. They know he has sensitive ears! He comes in from time to time and our Montessori classroom transforms into a focusing environment. Just take a look at this concentrated work: multiplication with Oliver, the dog, by your side. Notice that even the dog has to follow the rules like keeping his body off the rug and avoid putting materials in his mouth!