Have a 2 year old bred heifer calve first in a pen of 5 bred heifers. None of the other bred heifers have calved yet.The calf was born between 7pm wednesday and 6am Thursday. Have not seen the calf nurse yet, but I am not around during the day to observe. The cows teats are not swolen and her bag is smaller than it was prior to calving so it appears the calf could be nursing, however when I observe the calf trying to nurse the mother aggressively pushes the calf away with her head and kicks at the calf, not allowing the calf to nurse. What do you think of the situation?