Vinothraj, SAlagesan, PSaravanan Kumar, SSiva, MTANUVAS2020-01-072020-01-072019-01http://krishikosh.egranth.ac.in/handle/1/5810139945TNV_LRI_2019_7(1)19-21The dairy industry plays an important role in socio economic development of India. The main thrust of dairy industry today is to improve the efficiency of milk production through better understand the complex microbial interactions governing efficient nutrient utilization by ruminal microbes. Field trials conducted to study the performance of TANUVAS GRAND (Gruel Rooted Additive Nourishment Drops) supplement on augmenting milk production of dairy cattle in ten villages of Erode district. 03 Dairy farmers each village were selected for this trail and constituted a sample size of 30 milking cows with the average milk production of 8.5 litre/day/cow for analyze the milk yield and benefit cost ratio. Milk yield data collected in two stages viz, before and after administration of GRAND supplement. GRAND supplement administered animals produced the average milk yield of 9.20 litre/day/cow with the benefit cost ratio of 2.06, whereas before administration of GRAND supplement the same animals yielded of 8.58 litre milk/day from an animal with the benefit cost ratio of 1.85. The farmers realized the additional benefit cost of Rs 23 from an animal by including GRAND supplement in the feeding pattern of dairy cattle.enVeterinary ScienceArticle