Abstract: Milk production, quality and body weight gain of red Chittagong cows and their calves were studied in the village management conditions. From the study it was seen that feeding supplementary concentrate containing more UDP had beneficial effect on milk yield and body weight gain of red Chittagong cows and their calves reared traditionally under village management condition. Amount of per day milk production and weight gain of red Chittagong cows was higher than other indigenous cattle of Bangladesh except Pubna cattle.