Not the expression I would usually say, but a celebration indeed when the calf finally figured out how to suck the milk out of the bottle. It approached dark and we were holding a flashlight in our mouth in the dark barn hay-filled stall, holding his head, holding the bottle, using our fingers in his mouth to try to get him started and trying to keep him awake. He wouldn’t suck. At first we didn’t even know how to hold the bottle (straight down) or whether to make the nipple hole bigger (no) or whether to squeeze the bottle (are you trying to choke him?) so sucking, finally, is for celebration.