Babe - Pig in the City by Dick King-Smith

While Farmer Hoggett is laid up in casts and unable to work the farm, Mrs. Hoggett receives a visit from the bank. Now--with Babe's help--she must raise enough money to save the farm from foreclosure! In this hilarious story, Babe and Mrs. Hoggett get stranded in the big city on their way to the state fair. That means they won't collect Babe's appearance fee--and the race is on to pay the bank before it's too late. But first Babe and friends must survive in the big city!