Thank you for your query,

In simple terms I think it comes down to whether the horse needs additional calories for condition or work. If the horse does then NRM LowGIsport is perfect, but if you believe the horse will hold its condition through summer without additional calorie requirements then NRM Equine Balancer is the way to go. Obviously supplying ideally 1.5% of its body weight in roughage is essential and if you notice any changes in condition you should modify the ration accordingly.

I hope you find this information useful