Added: 5 years ago
From: n2loping
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  • hypp is a dominant gene that even in a N/N horse can apear any time if its related to impressive

  • @Hailleshorses if the horse has been DNA tested to be N/N for HyPP, then the gene is not present and will not appear - many descendants of Impressive are HyPP N/N and do not have HyPP and will not develop it at any time as they do not have the gene. As far as anyone can tell, it appeared by mutation one time only in Impressive (or one of his parents) and since then has only been passed on by inherited genes, and if the gene has not been inherited (as proven by a N/N DNA test) then HyPP is gone

  • whats hypp

  • No, no, no, a truly negative horse will not have an attack. There are other things that cause similar symptoms. Tying up and muscle cramps can look like a Hypp attack. Hypp attacks have nothing to do with size of muscles. I know of a Appy pleasure horse that had regular mild attacks if he is stressed. Tying up is often related to large muscles, which I have seen more cases of than HYPP attacks. Also, HYPP doesn't always make a horse more muscular.

  • HYPP is genetic. Recessve geene I belive. You can figure out the risk of having a HYPP foal by drawing out a punnet square with the mom and dad's geens. same square works for thalssemia, cicle cell anemia, as well as other disorders.

  • Your better off to have your horse tested for HYPP. N/N horses will never have an attack. N/H horses have a 50% chance of passing it on to their offspring and can be asymptomatic their whole lives and then have an attack.

    This comes from a genetic line from the sire Impressive.

    We can manage this disease with the correct feed. We can completely be rid of it by not breeding N/H or HYPP positive horses.

  • Agreed. Its so sad, this disease could be halted today if people would quit breeding known carriers, or go to the trouble of testing their horses when they do to all the trouble of breeding. It really is inexcusable.

  • The only horses that will have an HYPP attack are descendants of Impressive. N/N horse can not have an attack. I suggest you do your research on HYPP because you don't seem to understand anything about it. The generalization that halter horses are the ones that suffer from this because they are muscualar show that you haven't a clue. HYPP affects the sodium channels of afflicted horses and overloads the system with high potassium levels that cause muscle twitching, excessive yawning, and

  • paralyzing the muscles around the lungs and/or heart witch can kill a horse due to heart attack or suffocation. Futhermore, the disease is not contained to horses shown in halter. True most Impressive horses are shown in halter many are shown under saddle. Do some research because you have no idea what this genetic disorder is or what it entails. I find it highly insulting that you allow yourself to comment oon subjects you know nothing about.

  • Not true. Only horses that are N/H or H/H for HYPP can have symptoms. Yes, the gene mutation can crop up anywhere, incluing in humans, but in horses, so far only the Impressive lines have the mutation.

    You must be thinking of when a horse "tyes up" which is caused by overexertion. Tying up also causes muscles to twitch. This is VERY different from HYPP.

  • not nessicaraly. I have this disease and my muscles twitch due to muslce weakness or any small spazum. I agree with you 100% but, im just saying. I have the disease and i twitch from it too.

  • This is completely false. HYPP attacks occur in N/H and H/H horses...meaning that every poor horse soul that has to go through this has only irresponsible breeding to thank. You are probably thinking of when a horse is tying up.

  • Hey, I'm in Australia, and i'm about to buy a Hypp n/H mare, that's Asymptomatic (has never shown any symptomes on Hypp in the whole 13yrs of her life). do you find that having that disease affects the horses riding ability? ie:is it painful or dangerous to ride Hypp affected horses? do you ride yours?

    thanks for any info!

  • Breeding an affected heterozygous horse (N/H) to an affected heterozygous horse (N/H) will result in approximately 50% carrying the defective gene (N/H), approximately 25% will be normal (N/N) and approximately 25% will be homozygous carriers (H/H). Breeding an affected heterozygous horse (N/H) to a normal horse (N/N) will result in approximately 50% normal offspring and approximately 50% carrying the defective gene (N/H).

  • HYPP is inherited as an autosomal dominant trait, which means it can occur in both males and females and only one copy of the gene is required to produce the disease. The trait is inherited from generation to generation with equal frequency; it does not get "diluted" out or skip generations.

  • thanks for correctng me, I thought it was recessive.

  • what is HYPP?

  • HYPP is a genetic disorder that affects some descendants from the stallion Impressive. It causes muscle spasms and paralysis. Although there is a test to see if your horse is homozygous positive (H/H) or heterozygous (H/N), therefore EASY to breed out of the population, there are still those who breed horses with the disease, sometimes purposefully. I think its disgusting someone would do that, but there are lots of evil people in the world.

  • Just a reminder if you are going to comment, please keep it civil. I already deleted one. I want people to be educated to HYPP not get into knee jerk emotional reactions. Thanks!

  • One of the greates sire's ever, in his day EVERYONE wanted a foal by him or to breed to him and AQHA used him to make the association what it is today. And like I said, more horses die in a single day of colic and founder than a whole year from HYPP....Now where is the problem? Sounds like most owners don't even have a clue on how to feed, which is the root cause of 98% of all HYPP attacks, WHAT THEY EAT.

  • you're talking about impressive, arent you?

  • The biggest problem is that 95% of all so called horse people don't have their facts straight. I have been breeding, training and showing for 15+ years and have Impressive bred, N/N and N/H horses....even a couple H/H over the years and have NEVER had a poblem with any of them. I know what it is, the symptoms, how to prevent and treat. Like I've said, if AQHA tested EVERY horse that they registered, I'd bet $10,000 that says they'd find it elsewhere too. Impressive was one of the greatest...

  • AQHA and UC Davis have done random testing Quarter Horses, Paint Horses, and Thoroughbreds. The only N/H or H/H horses were direct decendants of Impressive.

    There are wonderful quality Impressive descendents that are N/N too. Why can't we keep the positives of him in our horse's genes?

  • The difference between animal breeding and people breeding are pretty simple. We pick the matings, not the horses. Furthermore, we do so to improve the breed. Why breed intentionally for horses who have a known, possibly deadly defect when there's so many other nice horses with the same breeding who don't carry it? It's a crappy market right now, which means we need to be even choosier about our crosses.

  • wait, when you say HYPP attacks are caused by feed, explain?

  • Excessive potassium can cause an HYPP positive horse to have more attacks, if they get too much potassium from their feed it can trigger an attack. The attacks are caused by a potassium imbalance, that's what Hyper-Kalemic means. Too much potassium.

  • oo, that clues into what i've been reading about-the certain feeds that are better for HYPP horses, like oats and beet pulp. if a hosre is a decendant out of impressive, has never had an HYPP attack like this one, never been tested, but sometimes when being riden stops and the muscles freeze up, would you say there's a chance he has HYPP? remember, he has jack spavins too, so that could be it.

  • He could just be out of shape and tying up maybe? Muscle cramps, etc. Usually when they have an HYPP attack it looks like worms crawling under the skin, not really a tensing. More like a trembling. Or they can get all the way up to thrashing on the ground and wheezing in extreme attacks. The best clue would be to test him, but that doesn't sound like HYPP to me anyway.

  • What makes HYPP different from colic is that it is YOUR choice to breed a HYPP positive horse! People don't choose to create a gorse that gets colic. We could get rid of HYPP completely and there would still be your precious HYPP negative Impressive bred horses for you.

    And I don't think that anyone said we should breed horses with bad conformation... Unless you think that horses without HYPP aren't good enough.

  • I know a lot of horses that are bred out of Impressive's decendants, and thank god they're all negative, or so we think, because I wouldn't be able to stand watching a horse do this...too sad...

    There is a stud that I've heard of that is bred to many Impressive's decendants because he's almost like a counter to HYPP positive horses....He's been bred many times to HYPP positives and has never thrown an HYPP positive horse, have you heard of him?

  • That is interesting. Do you know the name of the stud?

  • no, but I will find out for you.

  • oops sorry...do you mean the horse with jack spavins that freezes? he's not a stud-just a friends horse. the stud that almost counters the HYPP horses, I will find out for you.

  • People desperately need to research HYPP before giving their 2 cents worth! It is a FACT (scientifically proven) that HYPP can occour in any animal or get this..EVEN PEOPLE! I'd bet thousands that if AQHA tested every horse they'd find that it has occoured in a non-Impressive bred. It may have been a gelding or mare that never passed the gene on or drew any attention that they had the gene. I've been training, showing and breeding 20 yrs+ and haven't had one die from it, can't say that 4 colic

  • Its easier said then done to geld a HYPP H/H horse. I have a 2005 colt HYPP H/H and I can't geld him or it will most certainly kill him the vet says because putting him under will only triggers the attack and worsens it. The horse can't fight it like he would if he were awake. He has had such severe attacks that I don't dare do it. I keep him seperated from any mare and do not ever intend to breed him .

  • AQHA is NOT banning Impressive blooded horses. Get your facts straight. Too many breeders would have huge financial losses, don't see that one ever happening. AQHA will filter out and ban the HH, an NH horses from reproducing, but the NN horses will not be affected. Impressive bred NN horses DO NOT carry the HYPP gene, therefore cannot produce it.

  • Vets in Australia (where i live) have no idea about it. Apparently it's rare and mostly common in Arabs and Quater Horses because of the inbreeding.

    If anyone knows any more information about this message me, because my situation with my horse is getting quite desprate.

    I'm trying to find as much advice as i can.

    Thanks!

  • There is absolutely no HYPP in Arabians. All HYPP horses trace the the QH stallion Impressive.

  • I knew that =]

    But i thought it would also be in other breeds to.

    Thanks HEAPS =]

  • my QH have impressive in his lines and heget tested for it and it camo out negotive, but he dies from colic =[

  • This is really interesting!

    My Arab has seziures. But much more than a muscle twitch? Throws himself around in circles and brings his head to his flank. He sometimes even goes cast on the ground and always has convulsions with it.

  • That is something different unless your arab can be traced back to the QH stud Impressive, HYPP is not what is causing that in your arab.

  • Someone else told me that, thanks.

  • I understand people wanting a nice looking horse, but to knowingly breed with the possibility that you may end up with a horse with this problem is inexcusable, espesially siince there are literally thousands of other excellent stallions that do not throw this disease.

  • I have a horse who is out of Impressive and he has been tested and is negative... thank God! Just a note: yes they can suddenly fall down while riding or anywhere if they are positive, also you have to be careful about the sedatives used on HYPP positive horses. Get tested and then ask your vet, k?

  • HYPP is to ptassium what diabetes is to sugar. It is only found in horses that trace back to a stallion named IMPRESSIVE. The stallion himself was only a carrier, but over in-breeding or "line-breedig" have caused it to become a big problem.

  • Thank you. I hope that her will be fine today. What is de first drug that you mencioned (karo syrup)?. I have worked with horse in Peru in the past. That's why I have a little interest

  • Karo Syrup is not a drug it is White Corn Syrup. Used for pancakes and the like.

  • I have an HYPP HH horse and Karo syrup does work for attacks, not just for pancakes. I keep it stocked in the barn in case he has an attack.

  • I can't see very well what part of the body is. The sound is very loud too and doesn't explain the picture. Is this a horse (I guess)?. And, sorry by my ignorance. What is HYPP?

  • Sorry about the sound, I never have it on on my computer. The video is of her forearm. I took it on my phone at 8 pm, by the light of the tractor. Hypp is a genetic disorder that can cause muscle tremors. They can only be affected by it if they carry the gene that causes it. The gene has been linked to Impressive (aqha)bred horses. It can be controlled by diet, and many horses never have any problems from it, even if they carry it.

  • And many more HYPP AQHA horses die from this disease and yet breeders keep breeding them even though they have found a way to determine if the horse is a genetic carrier. Makes absolutely no sense. If the AQHA had any balls if a horse came up with a positive they should be sterilized.

  • AMEN! But the AQHA is WAAAAAAY to greedy to do something like insist on sterilization, that might cut down on there membership fees. I hear they are now accepting paint horses in an effort to remain the largest Horse Association in the world. It's ridiculous

  • AQHA is starting to not allow any horses that trace back to Impressive to be registered. Not really fixing anything, but I guess it is saving their butts.

  • So far, they've only stopped registering H/H horses. N/H are still allowed. N/H horses are still affected (and pass it on) but there are far too many people with far too much money and influence invested in these horses for the AQHA to stop it. Shame really.

  • That it is. But at least they are trying.

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