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PHA - TH Posted by Custer on April 16, 2008, 10:14 pm 207.68.215.31 ok if a bull have PHA or TH and the cow has PHA or TH and the bull is bread to the cow will the 100% come out deformed?  Post a Response

Re: PHA - TH Posted by showman, ne on April 17, 2008, 12:54 am, in reply to "PHA - TH" 129.93.105.103 no only 25% i wouldn't risk it though...  Post a Response

Re: PHA - TH Posted by dragon lady on April 17, 2008, 10:27 am, in reply to "PHA - TH" 35.10.40.139 As with any recessive trait or defect - 2 carriers gives you a risk of 25% affected (in the case of PHA oe TH dead), 50% carriers (looks normal genetically carries defect), and 25% genetically and phenotypically normal (looks normal and is genetically normal). You can think red vs black color for recessive traits - breed 2 black colored red carriers 75% will be black and 25% red - but 2 or 3 of the blacks will carry the red gene. Also the "risk" is the same for each breeding - so if you have had a PHA calf from the first mating doesn't mean the next 3 are not dead! Risk the same for each mating. Overall it you bred carrier to carrier 100 times the odds would give you 25 dead with PHA, 50 carriers, 25 normals. I'm with showman - I wouldn't risk it - with PHA you risk both a dead cow and calf....  Post a Response

Re: PHA - TH Posted by ohio on April 18, 2008, 10:30 am, in reply to "PHA - TH" 74.219.149.67 I agree with the others. I've had calves from each defect more than once (before it was known much about) and I'm not going to play the odds and breed any carriers to any carriers, no matter how great I think it could be if I get a live calf. Calving either of these defects is a huge, life changing nightmare for anyone with good animal husbandry sense and values. I still get a little shaken just thinking about the one that we took out in pieces that last calving season before the TH test was developed. I calved a couple for about 3 years in a row that really made me lose sleep at night for a while. Luckily only lost 3 cows to those ordeals.  Post a Response

Re: PHA - TH Posted by Gary on April 18, 2008, 2:57 pm, in reply to "PHA - TH" 208.246.86.5 I'M not going to tell you what to do but when you ruin one of your best cows that took at least three years of matings to get her you will never do it again.  Post a Response

Re: PHA - TH Posted by Tony, OH on April 18, 2008, 7:30 pm, in reply to "PHA - TH" 140.228.115.236 It can be risky but i wouldnt do it. in my experience you can breed TH or PHA bull with a clean cow or vise versa but usually you want a bull calf to come out because a heifer will be a carrier.  Post a Response

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