The protein content of grass will vary widely according to the time of year and stage of growth. Young grass that is growing rapidly in warm spring weather will contain high levels of protein
The protein level of hay will vary according to the type of grass it is made from, and when it has been cut. Hay made mainly from grasses normally contains between 8-14% protein.
Protein is essential for horses as it is the key nutrient required to build, repair, and maintain body tissues. Every single cell within the body contains protein
All types of grass eaten by horses contain protein, but the amount fluctuates according to the quality of the grass, the weather conditions, and the time of year.