One of the things I learned from the local feedlots is to make a tub or two of the Smart-Lic Stress Lic tubs available to the new weaned calves...

They were doing it- and said it greatly cut their sick calves rate-- and since I started doing it a couple of years ago- have not had any sick calves...

Just something to keep them going good until they learn to eat good..

http://www.smartlic.com/products/stresslic.html