If it' s clover or alfalfa hay, a few timely cuttings and an overseeding with clover in the spring might rejuvenate it. My bird' s foot trefoil is spreading like crazy where I mow the grass short. It' s thinning out in the field where it has to compete with the taller grass and there is less mowing.

The frequent mowings also keep the clover etc, more tender for the deer.

Dan O.