a lesson on the blind

Today in Nathan's class they had a mom who is a member of the preschool and who happens to be blind bring in her seeing eye dog, "Pence". What a wonderful learning experience for the children. I was not fortunate enough to be there during the presentation but Nathan was so excited when I arrived to pick him up to fill me in on everything that he learned about Pence, the helper dog.
This is Pence and his owner Sadie.

Pence being such a great dog and was happy to let all the kids pet him.

I'm wondering what came out of his mouth after waiting so patiently with his hand raised.