I have had lots of experience with this. Back the calf into a corner, straddle it with your legs over the neck so you can hold it back by it's front shoulders with your legs. Shove the nipple in, wrap your other hand around the calf's mouth and squeeze intermittently to simulate sucking, while tilting nose upward. Let him (and your back) rest from time to time. Just try to get a few gulps down. It takes time and a lot of patience. It helps a lot if someone else can handle the bottle for you, easier on your back. Repeat as often as possible. Eventually he'll get the hang of it, usually after two or three feedings when he's good and hungry. If the calf starts looking lethargic and droopy-eared you may have to tube him. But a healthy calf will almost always take to the bottle. Also open up the nipple opening a bit, you're gonna spill a lot but it will help get him going. Just keep working at it, they'll figure it out. Good Luck, Let us know how it goes.
