Horse betting is a foal’s game! November 3, 2022 Fact: #3353 What Are Your Chances? The age of the horses in horseracing has shown to have a significant influence on the winning outcomes of the races. In fact, around 76% of Durban July winning horses were 3 or 4 years old. The remaining 24% were 5 years old. Sources: one, two ShareTweetShare