0.5 ml serum
Seven animals per feeding group should be tested when investigating herd problems. Typically this would be seven "fresh" or seven "close-up" cows. Samples should be taken just before fresh feed is offered (especially for cattle on component-fed rations. For cattle receiving TMR diets, timing is less important). Please include animal ID, age, species and lactation stage for each animal. Ship overnight and avoid weekend arrival.