Which training method can improve a horse's response time?

Ground training is recognized for its effectiveness in enhancing a horse's response time. This method involves working with the horse on the ground, focusing on developing responsiveness to commands, improving the horse's balance, and increasing their confidence. Ground training typically includes exercises that help the horse learn to listen to cues from the trainer, which can translate to quicker reactions during riding or racing situations.

By building a strong foundation through ground work, trainers can positively affect a horse's overall athleticism and mental responsiveness, crucial factors for improving response times. This method allows both the horse and the trainer to establish a strong communication bond, which encourages the horse to react promptly to commands.

In contrast, the other options do not focus primarily on enhancing response time. Cold therapy helps with recovery and soreness, long-distance running can improve endurance but may not specifically aid in quick responses, and randomized feeding does not impact a horse's reaction time directly.