You decrease the amount of grains in the diet, preferrably to none at all and replace them with a protein/vitamin/mineral supplement that is forage based. These are commonly called ration balancers and are fed at rates of 1-3 lbs per day depending on the brand, the size and workload of the horse, the quality of the hay, etc. You may also cut the amount of forage fed daily if a horse is on hay, however you should never go lower than 1% of the horse's body weight in forage per day. Pasture time may also be limited or cut out completely in order to control the amount of forage consumed per day. Or a grazing muzzle may be put on the horse to cut down on the ability to graze as efficiently.
A horses diet should consist primarily of forages like grass or hay and minimal to no concentrates. For horses that require a specialized diet it's best to have a equine vet assist you.
A Prezwalki horses diet does not differ from any other horses diet. In other words, the breed can eat the exact same as any other breed.
Yes
grazing
yes
Protein is essential for horses as it helps in muscle development, tissue repair, and overall growth. Horses need about 10-12 protein in their diet to maintain good health and performance.
Salt
false
food dont you know that you
raw eggs aren't good for any diet.
horses and cows have a similar diet and their both large animals
A horses diet varies on many things, ie its breed, size, condition plus many more. For example heavy working draft horses will not be feed the same quantity as a shetland child's pony. I own two standardbreds and they both live on 2 "biscuits" of lucerne hay (second cut) daily, if they were competeing horses they would have a different diet with added grains.