Sam and Spider build a tree house and go there with Lolly to trade stories.

From Booklist
“Every dog at Hilltop Farm was a winner.” Some win agility contests, some for sheepherding, and some even get Best in Show—except for Sal, the Portuguese water dog. She can swim, but nobody gives medals for swimming. With her mother’s encouragement, Sal is determined to be the “Swimmingest Dog in the World.” She practices in the creek, the bathtub, the plastic pool; she even attempts to join the local swim team but is kicked out. Frustrated by the No Dogs Allowed sign now hung o ...