Found out the hard way, keep some colostrum on hand. It can be either the powder or frozen form. As for the frozen thaw in warm water,NOT repeat NOT the microwave.
Did you stick your finger in the calfs mouth and see if it had the sucking reflex? Was the moth warm or cold?
Normally if I could get a calf to suck on my finger I could normally get it to suck on the bottle. Had to back a couple into a corner, straddle them, force the nipple into their mouth and massage their throat until they started swallowing.
Let us know how its going.