For several days now in our neighborhood, the signs have been plastered with the face of a tiny lost chihuahua. Miles started noticing these after a while and would just say, "Look at the little puppy!" and we would explain to him that it was lost and someone was trying to find it.
This morning we were out driving and he started asking, "Who lost that puppy?" and I told him we don't know them, they just live somewhere near us. Then I said, "Miles, before you were born we had a sweet little cat named Toby, and he went missing." Of course he had lots of questions about him, mainly wondering where Toby went. I said, "I don't know...he just went away."
"Mama," he said, "maybe he was just shy."