LuLu's New Pony by Doreen Anne Slinkard

Another Wicky Wacky Farm story sure to steal your heart! This exciting adventure about Lulu's New Pony takes place on her family horse farm in Australia. When LuLu receives a white pony named Miss Pickles for her 10th birthday, she's sure the new pony will beat the boastful Melony Parker's pony at the show. But Lulu's in for a big surprise when Melony gets a new pony too, and both animals look exactly alike! Just before the event the ponies are accidentally switched, and it becomes a dilemma when a winner must be chosen.