Season 3, Episode 13
A rainstorm is on its way, so Barney and the kids go inside the treehouse where they discover a bird's nest. This leads to a lesson on animals and their different types of homes that they live in. As a result, Tosha loses her new locket from her backpack that is taken by a squirrel and Shawn keeps sneezing from animal hair. Kenneth also feels worried about the egg but it hatches because of a baby chick