Nice idea for the summer months: freeze gallon jugs of water and place them in horse's water tanks to keep drinking water cool. except my horse would destroy these and his water would stay luke warm, regardless.
6 Exercises For Dressage Riders. Improve posture, core strength and stability
Coconut oil works wonders on a horses mane and tail. Just massage it into the base of the mane or tail and leave it dont wash it out. You can do it as much as you like. It will soon make it soft and supple and also helps with hair growth. You can buy it from the store.