How can you get 10 gold horseshoes in Bella sara under the straw

when you are "mucking" your foal's stall, you may find one golden horseshoe hidden in the straw. however, it is chosen randomly, so you might find (for example) 2 horseshoes in the past 2 days, but the next day you may not find any. once you found ten, you will receive an award and will be given horseshoes.