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Is This Shorthorn Bull TH Positive?
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<blockquote data-quote="Brandonm2" data-source="post: 153894" data-attributes="member: 2095"><p>No you can not "eyeball" TH carriers. They should appear to be prefectly fine, healthy cattle. The homozygous TH cattle (two TH genes) die. You can contact the Shorthorn association and ask them about what they know about the sire, grandsire, dam, and maternal grandsire's TH status; but mandatory TH testing for donor dams and AI stud bulls will not be implemented until next year so the information available to them is pretty limited. Ask the seller if they have tested the calf or their herd yet or if they have had any TH deaths. Hopefully he is an honest and progressive breeder; though the Shorthorn association's response as a whole has been rather unimpressive in this whole TH issue to date. Of course even if the heifer IS a TH carrier as long as she is bred to ONLY certified TH free bulls you should not have a problem.</p></blockquote><p></p>
[QUOTE="Brandonm2, post: 153894, member: 2095"] No you can not "eyeball" TH carriers. They should appear to be prefectly fine, healthy cattle. The homozygous TH cattle (two TH genes) die. You can contact the Shorthorn association and ask them about what they know about the sire, grandsire, dam, and maternal grandsire's TH status; but mandatory TH testing for donor dams and AI stud bulls will not be implemented until next year so the information available to them is pretty limited. Ask the seller if they have tested the calf or their herd yet or if they have had any TH deaths. Hopefully he is an honest and progressive breeder; though the Shorthorn association's response as a whole has been rather unimpressive in this whole TH issue to date. Of course even if the heifer IS a TH carrier as long as she is bred to ONLY certified TH free bulls you should not have a problem. [/QUOTE]
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