Daily Lysine Requirement for 1100 Pound Horse

There are 22 amino acids that make up proteins. Out of the 22, the horse can make twelve and ten must be present in his diet in order for his body to build proteins. Lysine is referred to as the limiting amino acid because it is most lacking in the diet. . Therefore care must be taken to provide adequate amounts. The amount needed is related to the weight and age of the horse and what the horse is doing.

The following table is for one weight class of the horse. There will a difference in values for horses maturing to either a lighter or heavier weight.

Animal	Lysine in grams
Mature Horses
Maintenance	23
Stallions (breeding season)	29
Pregnant mares
9 months	28
10 months	29
11 months	30
Lactating mares
Foaling to three months	50
3 months to weaning	37
Working horses
Light work	29
Moderate work	34
Heavy work	46
Growing Horses which will mature at 1100 pounds
Weanling, 4 months	30
Weanling, 6 months
Moderate growth	32
Rapid growth	36
Yearlings, 12 months
Moderate growth	36
Rapid growth	40
Long yearling, 18 months
Not in training	38
In training	50
Two year old, 24 months
Not in training	32
In training	45

Reference: Lon D. Lewis "Feeding and Care of the Horse"

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