Thirty three crossbred Holstein Friesian cows were randomly allotted into three equal groups namely control, treatment I and treatment II with regard to body weight, milk yield, fat percentage, parity and ranks obtained in visual appraisal body score technique (VABS). Animals in control group received no supplementation in diet of rumen escape fat popularly called bypass fat whereas animals allotted to treatment 1 group received 100 grams supplementation and those in treatment 2 group received daily supplementation of 150 grams in diet from 7th day from parturition till end of trial. Milk yield, milk fat percentage, body weight, VABS and incidence of ketosis were measured in all 33 animals on 7th day from parturition and then every fortnight till 91st days post parturition. The results indicated that animals in both treatment groups that received bypass fat supplementation performed better than control group with regard to average weight gain, milk yield, milk fat percentage and performance of both treatment groups were comparable in all measured variables. Animals in both treatment groups that were supplemented with bypass fat showed no incidence of ketosis and yielded better VABCS than control group. Supplementation of 100 grams of bypass fat was found to be effective in improvising milk yield, milk fat percentage and preventing weight loss during initial 90 days of lactation. Supplementation also resulted in animals to have no incidence of ketosis and to yield better VABS than animals in control group.
Bypass fat, rumen escape fat, visual appraisal body condition score
