ABSTRACT PROCESS OF PREPARTION OF LIVESTOCK NUTRITIONAL SUPPLEMENT AND ITS USAGE IN RUMINANTS The present invention discloses a process of preparation of livestock nutritional supplement comprising copper sulphate, cobalt sulphate and urea as a source of copper (6ppm), cobalt (0.03ppm) sulphur (3ppm) and nitrogen (23%) named Tamil Nadu Veterinary and Animal Sciences University - Gruel Rooted Additive Nourishment Drops (TANUVAS - GRAND) and its usage to promote proliferation of rumen microflora in ruminants as milk yield enhancer, digestibility improver and to prevent the onset of sub acute ruminal acidosis.