INSULIN RESISTANCE

 

All horses need fiber in their diet and some of it must be the form of long hay. Horses challenged by metabolic syndrome should be offered hays that are low in non-structural carbohydrates or NSC. This class of carbohydrates includes starch, water-soluble sugar, and fructan.

Normal horses can tolerate NSC levels of 20% or higher. It is recommended that horses with metabolic syndrome consume hay with NSC levels of around 10% to 12%.

In order to know the true NSC value of your hay you will have to test it, but understanding the factors that affect NSC levels will help you pick a hay that is more likely to meet your horse’s needs. Several factors affect the NSC levels found in a cutting of hay. Multiple cuttings from the same field of grass can yield hay with different levels of NSC. The type of plant, maturity when harvested, time of cutting, time spent curing in the field, and environmental conditions during harvest all contribute to the amount of NSC found in the plant. When choosing hay for a starch/sugar sensitive horse, you have to consider all these factors.

Type of plant:

Typical NSC levels in different types of hay*