In that apple flavor that is an all-time favorite amongst the equine set, Cox Vet Lab Perk A Lyte Powder Horse Supplement is designed to help replace the electrolytes lost during your horse’s exercise, whether it’s cantering in the show ring or galloping in the pasture. Safe and effective for horses of all classes, Cox Ver Lab Perk A Lyte Powder Horse Supplement is a salt-based, oral supplement that will help your horse feel his best after a workout.