The Pig in the Pond - Martin Waddell

Pigs don't swim, or so it's said.
But on one of the hottest days of the summer, the pig on Neligan's farm sits by the pond feeling envious of the ducks and the geese floating in the cool water.
Finally, when she can endure the heat no longer-splash!-this sweltering pig takes a dive, throwing the entire farm into an uproar.
It isn't long, however, before the refreshing idea catches on, and the pig finds that she's got company!
This spirited tale with its exuberant illustrations is sure to be a hit with all those young and old who ever wanted to take the plunge.