Similar to Olympic disciplines for human athletes, the winning margins in the thoroughbred industry are very small.
In fact, there is a 0.3% difference between first and second place in racehorses and just a 1% improvement in performance can mean the horse placed fourth will then win 75% of the time (flat) and 50% of the time (NH).
Racing trainer and vet Ilka Gansera-Lévêque knows only too well how small the winning margin is and how marginal gains can help. Have a read of this interesting article on the concept of marginal gains in racing and find out why more than 70% of the top racing trainers in the UK use Haygain.
Reference: Spence et al., 2012
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Hydration is probably not the first thing that occurs to us approaching winter but as vet Stephanie Davis, DVM points out, it can be a big issue.