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post #11 of 53 Old 04-22-2010, 10:24 PM
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Info on hypp:
Horse HYPP
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post #12 of 53 Old 04-22-2010, 10:25 PM
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Originally Posted by Arksly View Post
I have never even heard of HYPP... What is it and what do horses look like when they have it?
HYPP is also known as "Impressive Syndrome". It is a genetic defect that traces soley back to Impressive, who was, as his names says, an impressive horse. He is the sire that basically defined the look of todays quarter horse. People were so drawn by his look that they bred to him very heavily. It wasn't until many years later that HYPP was actually given a name and then it took quite some time before it was traced back to Impressive. So they disease spread for many years with the public having little knowledge about it.

AQHA has since implemented rules stating that foals that are not HYPP/NN can not be registered. (HYPP is an inherited desease that comes only from descendents of Impressive - and in order for them to pass it on, they must carry the gene.)

HYPP stands for hyperkalemic periodic paralysis. This condition is characterized by intermittent episodes of muscle tremors (shaking or trembling, weaknesses and/or collapse.)

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post #13 of 53 Old 04-22-2010, 10:26 PM
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^ So far the anomoly is only present in those horses related to Impressive, however far back, so there is no need to test registered horses of any breed that have traceable lineage back to 1968 that don't show Impressive, as it is impossible for them to have it.

Granted, those with grade horses would need to test, which is the biggest hurdle. Those with grade horses shouldn't really be breeding without testing their stock anyway but they do.

However, eradicating Hypp in registered horses would be a huge step - One of the main reasons people breed for Hypp is because of the potential they feel it has for the halter ring.

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post #14 of 53 Old 04-23-2010, 07:12 AM
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Originally Posted by trailhorserider View Post
What I find really sad is it is being introduced into other breeds as well, for instance Paints and Appaloosas.
I agree.

And then the breeds (at least the appy people) make it legal to show on the maintenance drugs people use to keep their HYPP horses going.

So, in other words, making HYPP an OK thing.

It is sad.
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post #15 of 53 Old 04-23-2010, 07:55 PM
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My understanding is that HyPP HAS occurred in horses with no relation to Impressive. Maybe that's incorrect, but I've seen people swear up, down, and sideways that they're horse has HyPP but there was no Impressive in it's lineage.

My mare is Impressive bred, and thankfully, N/N. And yes, ideally, every horse on the planet should be tested and then not bred if it has the condition, but simply stopping the breeding of already known N/H or H/H horses would help tremendously.

A horse can have HyPP and never once show a symptom. Or never show a symptom until it's 23 and then drop dead because the heart basically seizes. Or it can have "seizures" from day one. It can be SLIGHTLY controlled with feed low in potassium, but that's not a cure, it's not even preventative, because the body is still creating the excess potassium. You just aren't doing more to cause it.

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post #16 of 53 Old 04-23-2010, 08:32 PM
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Originally Posted by farmpony84 View Post

AQHA has since implemented rules stating that foals that are not HYPP/NN can not be registered. (HYPP is an inherited desease that comes only from descendents of Impressive - and in order for them to pass it on, they must carry the gene.)
Actually N/H horses can still be registered only H/H horses can not at this time.

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post #17 of 53 Old 04-23-2010, 08:36 PM
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Originally Posted by riccil0ve View Post
My understanding is that HyPP HAS occurred in horses with no relation to Impressive. Maybe that's incorrect, but I've seen people swear up, down, and sideways that they're horse has HyPP but there was no Impressive in it's lineage.

Actually that is incorrect. At this time only Impressive bred horses have been shown to have HyPP. However there are things like a horse tying up that mimic HyPP symptoms and people just just on HyPP and never actually test to make sure.

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post #18 of 53 Old 04-23-2010, 08:42 PM
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Originally Posted by wild_spot View Post
^
Granted, those with grade horses would need to test, which is the biggest hurdle. Those with grade horses shouldn't really be breeding without testing their stock anyway but they do.
I don't think that grade horses would be the biggest hurdle at all. Because the only "grade" horses I have ever heard of getting HYPP are obviously well bred QH's that were dumped at an auction or something without their papers because they are HYPP positive. People with grade horses would never breed FOR HYPP. People with halter quality Quarter Horses, Paints and Appaloosas are the ones who breed FOR HYPP. I think it needs to start with what the judges are seeking in the halter ring!

If a HYPP horse trickles down into the grade horse population, he ended up there because he is HYPP positive, not that grade horse people are breeding for it. That's how I see it anyway. Who in their right mind would breed FOR it, except for the halter horse folks because that's what does well in the show ring? There is no positive at all I can think of for anyone to breed HYPP horses outside the halter ring. You certainly don't seek that in a riding horse.
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post #19 of 53 Old 04-23-2010, 11:20 PM
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Originally Posted by ZipItNita View Post

I have an HyPP N/H mare that IS symptomatic, and is regulated/controlled with diuretics and diet. That being said... she's a lovely little thing, and just the sweetest little monster I've ever met. :]
I have no problem with HYPP horses existing, however, I do have a problem with them being bred. No horse with a genetic disease or defect like HYPP should be bred, symptomatic or not.

I own a 12yr old Impressive grandaughter who is HYPP N/N (Bridgette aka Distinct Impression in "My Barn"). I really like the bloodline, but not the disease.
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post #20 of 53 Old 04-23-2010, 11:22 PM
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Grade horses should not be bred in the first place, unless they are adults with a proven top show record and stellar conformation. I do agree that they should also be tested, for every genetic abnormality and/or disease/defect that can be tested for, across the board.
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