Yesterday I was on a dairy that feeds colostrum from bottles stored in a refrigerator. They have to warm each bottle before it can be fed. As I stood at the sink in the milk house I asked the calf care person to show me how she warms colostrum. She sat a plastic container in the sink and filled it with water.
On a farm visit just one week before we checked both the bottles used to store the colostrum and the esophageal tube feeder used to deliver the colostrum. We used a SystemSURE Plus luminometer that reports back in relative light units (RLU). These RLU's are highly correlated with standard plate counts from bacteria cultures.