It is now June, but Stamina Plus has evaluated nutrient levels from hay fed this spring. Hay that is fed in spring is really almost a year old. As horse owners wait for the first hay crop which depending on where you live is either in June or July, do you start to see your horses having trouble holding weight. Hay from last year has lost 30% of its nutrients. Therefore it is important to increase the amount of hay fed per day to maintain your horse’s weight.