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Production records are also a guide 10 the intelligent culling ol the cow herd, he snid Breeding Cows R. G. Connelly, extension dairy! husbandman, discussed breeding; principles that are essential in im proving the dairy herd. Mr. Con- t nelly said that as a rule dairy herd improvement should be' brought about by breeding all cows to a bull known, to have high milk and butterfat production background. Not only should he have high production in his breeding, but the bull should be proven to the extent that it is known that he is transmitting high production to his offspring. A very small percentage of the bulls that are the progeny of high producing dams and proven sires are able to transmit high pro duction to their daughters. This is the point at which many dairy men have failed. They have de pended on an unproven bull that might have had high production m his background and found out too late that his daughters were low producers, he said. Th s is a serious risk that all dairymen who are not using a proven bull, take. In the past, this was a risk that all dairymen had to take, unless they were able to buy a proven bull. Mr. Connelly said. Now, every owner of dairy rows in Charlotte county ran breed his cows not only to proven
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