A rancher had a three weak old bull angus calf born premature. He was tired of feeding it and gave it away. He said the gut is underdeveloped. It is cold, laying on it's side, breathing heavy and somewhat raspy.. We brought it home and gave it a belly full of warm milk, we had to pour it in and rub the neck to get it to swallow. We have a heat lamp on it and it is laying in straw in a greenhouse. He was going to kill it, we figured it was worth a try. Any tips to keep it running?