I HAVE A 1 AND 1/2 MONTH OLD CALF THAT HAS BEEN ORPHANED. DO I NEED TO PEN THIS CALF AND FEED IT MILK REPLACEMENT OR CAN I JUST START FEEDING IT SOME TYPE OF DRIED FEED, OR WILL IT START UTILIZING GRASS IN THE PASTURE AND THEREFORE I DO NOTHING BUT WATCH IT. ANY HELP WOULD BE GREATLY APPRECIATED. THANKS, MIKE.