HYPP Testing - The Horse Forum
 
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post #1 of 8 Old 02-07-2009, 02:10 AM Thread Starter
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Exclamation HYPP Testing

Don't know if this is the right spot to post this topic, but I'll give it a shot.

I was just curious about criteria for HYPP testing. I'm going to look at a mare tomorrow (it just occurred to me NOW) that is Impressive bred. I know Impressive horses are some of the main carriers of HYPP. I was told by the owner that she had NOT been tested because her sire was not a carrier and that if the sire isn't, the foal shouldn't be either, regardless of the dam. Is this true? I have NO idea. I'm going to do a little research before I go to sleep, but I figured I could ask for some help here as well. Thanks!! :)

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post #2 of 8 Old 02-07-2009, 06:08 AM
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Quote:
Originally Posted by randiekay215 View Post
I was told by the owner that she had NOT been tested because her sire was not a carrier and that if the sire isn't, the foal shouldn't be either, regardless of the dam.
Warning...HYPP discussions tend to get very emotional.

In HYPP info, you will see H/H, N/N, and N/H.

Regular genetic rules apply and it is true the foals cannot be H/H, but they could inherit one HYPP gene from the dam.

H/H means the horse has inherited the HYPP gene from both parents. You definately want to stay away from this, but if the sire is not a carrier, the foals cannot by H/H.

The more emotional discussion revolves around N/H horses, where they have an HYPP gene from one parent. I suggest you research unbiased literature (e.g. from vet schools) about this for your decision. From what I've read, many N/H horses never get symptoms at all, to some with mild/rare symptoms, to some with more, and the key is managing their diet. Part of the problem is that there are no real statistics about how many horses are affected and how.

Finally, of course the N/N horse that does not have any HYPP genes.

There is an HYPP overview on the AQHA website that includes research references at AQHA - HYPP INFORMATION

If you are concerned in the least, I would pay the $40-$50 to have the mare tested, so you won't be wondering about it. I certainly wouldn't walk away from a good horse just because it was Impressive bred.

BTW, our Paint mare, Lady, is Impressive bred, and is N/N.


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post #3 of 8 Old 02-07-2009, 09:48 AM
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to answer your question in order for your horse to not need to be tested BOTH parents would have to be HYPP/NN. If BOTH parents are not carriers THEN the baby doesn't have to be tested. If mama is NOT an impressive bred horse, then you don't have to test. Only if BOTH parents are IMPRESSIVE bred do you have to worry about this. You said daddy is NN. Is mama an Impressive mare? if she is, you need to know if she has been tested, if she hasnt then baby has to be tested but only if she has impressive in her blood....

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post #4 of 8 Old 02-07-2009, 11:11 AM
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This Walking Horse owner thanks all of you for the info and the link.

My boss' dad's 20-something horse just laid down and passed away last week. He is looking to replace the horse because they do a lot of trail riding.

One prospect is a Paint with Impressive breeding. I know about HYPP in the Impressive line but that's all I can say I know.

Now I can pass this information along to them as all they want is to replace a great old friend and trail horse with another friend and trail horse
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post #5 of 8 Old 02-07-2009, 04:34 PM
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I always recommend this site. I found it very very informative
Index

For the test, you can either submit hair (I believe mane hair for older horses and either tail or mane hair for younger horses) You can also send in blood to be tested.

I sent away mane hairs and in about 2-3 weeks I heard back. My mare is N/H, though she has never shown any symptoms in her life (she's 5) She is managed through her diet and with exercise/turnout.

Even though the owner said the sire does not have it, i would try and research the sire to just to see (some people may lie about that as Hypp could be a make or break factor)
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post #6 of 8 Old 02-07-2009, 06:11 PM
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if you have the sires name and the mares name I can pull them on AQHA. if they are N/N it will say on their papers.

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post #7 of 8 Old 02-08-2009, 10:08 AM
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Quote:
Originally Posted by farmpony84 View Post
to answer your question in order for your horse to not need to be tested BOTH parents would have to be HYPP/NN. If BOTH parents are not carriers THEN the baby doesn't have to be tested. If mama is NOT an impressive bred horse, then you don't have to test. Only if BOTH parents are IMPRESSIVE bred do you have to worry about this. You said daddy is NN. Is mama an Impressive mare? if she is, you need to know if she has been tested, if she hasnt then baby has to be tested but only if she has impressive in her blood....
I agree with this. If the dad is NN but the mom is HH your going to get a HYPP positive horse. The foal can get HYPP from the mother not only the father. I would ask if the mom had HYPP, if not then you have nothing to worry about.

Brittany
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post #8 of 8 Old 02-09-2009, 12:17 AM Thread Starter
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Well, I found out that the dam was not Impressive bred at all....Which is a good thing. Thanks for all of your input. There were some really helpful hints and tools. I love this place! So many knowledgable people!!! :)

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