I've done that before as well!You're not gonna like my answer but if I end up with a bottle calf, it stays on the bottle until it's weaned with the other calves (appx. 6 months) or no longer wants the bottle. In which case, the calf has usually either been adopted by another cow or has mastered the art of robbing. BUT I have a beef cow/calf operation and ending up with a bottle calf is rare. @MurraysMutts is the master of bottle calves!