Puppy Love is also a oldie written by Paul Anka.
This episode has 2 Cailette musical segments - the main song and a reprise.
Cailette musical number: If you have a puppy / If you have a puppy Reprise
The story title "Lost and Found" in this episode is a common title among children's television programming. there is also a ocmplete episode of Caillou by this name, as well as Sagwa the Chinese Siamese Cat, Timothy Goes to School, Anne of Green Gables and Bear in the Big Blue House.