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<blockquote data-quote="Son of Butch" data-source="post: 1136662" data-attributes="member: 14585"><p>No experience and I've only seen a few [all were holsteins]</p><p>No unsurvivable defects...but genetic defects could cause early terminated pregnancy and who would know?</p><p></p><p>Of the 1/2 sibling mating results I've seen only one with a weird appearance, she was under sized with an over sized head, </p><p>she had shoulder problems and her forelegs were short and very bowed.</p><p>She grew to adulthood and entered the milking herd...I'm sure she was culled during her 1st lactation.</p><p>That was when I saw her and at that time she moved as though she was a very old cow.</p><p></p><p>Over 20 yrs ago Select Sires had a bull from 1/2 sib mating that made it into their proven line up.</p><p>A son of Norcroft Elevation Ella EX-97 sired by her 1/2 brother Marshfield Elevation Tony VG-88</p><p>IF I remember correctly he scored VG-85 and ended up being ok but a bit of a disappointment given his parentage.</p><p></p><p>I also saw result of a mother x son mating. (the sire was a Big name A.I. sire)</p><p>That son entered a private limited A.I. proving program, he looked normal, but his daughters performance was poor </p><p>and he was sent to slaughter.</p></blockquote><p></p>
[QUOTE="Son of Butch, post: 1136662, member: 14585"] No experience and I've only seen a few [all were holsteins] No unsurvivable defects...but genetic defects could cause early terminated pregnancy and who would know? Of the 1/2 sibling mating results I've seen only one with a weird appearance, she was under sized with an over sized head, she had shoulder problems and her forelegs were short and very bowed. She grew to adulthood and entered the milking herd...I'm sure she was culled during her 1st lactation. That was when I saw her and at that time she moved as though she was a very old cow. Over 20 yrs ago Select Sires had a bull from 1/2 sib mating that made it into their proven line up. A son of Norcroft Elevation Ella EX-97 sired by her 1/2 brother Marshfield Elevation Tony VG-88 IF I remember correctly he scored VG-85 and ended up being ok but a bit of a disappointment given his parentage. I also saw result of a mother x son mating. (the sire was a Big name A.I. sire) That son entered a private limited A.I. proving program, he looked normal, but his daughters performance was poor and he was sent to slaughter. [/QUOTE]
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