Make changes quickly to prevent:

Grass growth slowing drastically,

Grass energy stores in shoots and roots becoming depleted and affecting further growth

Animal Tips  
Suckler Cows and calves <12 months old Cows and Calves will not thrive unless more grass is available or supplementary feed introduced
Dry Cows Cows will lose weight
Weaned Store Cattle Stock will lose weight
Finishing Cattle Cattle are likely to lose weight
Lactating Dairy Cows Milk yield from forage will be severely reduced
Bulling Heifers Heifers may lose weight