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Bred to a HYPP N/H Stallion

I foolishly, knowingly bred my mare to an NH stallion with the thinking that I only had a 50% chance of producing an NH foal...didn't bother to (or maybe didn't want to) consider that I only had a 50% chance of an NN foal too!!
Of course, the filly was NH! After talking to quite a few owners and show people, I decided not to worry about it, even continued to feed her Omolene 200 AND soybean meal to keep her with a nice show coat. I did continue to stay updated on HYPP just in case...
It wasn't until last fall as a 3 year old that I NOTICED her having an attack while I was grooming her. Who knows if this was her first or if there had been others that had gone unnoticed. It started with the little ripples, much like when you toss a stone into a pond. Although I had never seen any sign in any horse before I had a horrible hunch what was going on. I took her off the cross ties and was planning on taking her into the indoor arena to get her moving since I had heard that mild exercise can prevent or stop an attack. So much for that idea!! She could barely walk, looking like a drunk stumbling out of a bar! I decided the best place for her was in her stall so I got her in there and called the vet.

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Carolyn and Tory, a HYPP Positive Filly

This is a story of a my 13 year old daughter, the love of her life, her horse and a disease that has left my daughter devastated. On March 5, 2001 at 4:30am, a beautiful filly was born. The instant that Carolyn saw her there was a strong bond, and watching them looking into each others eyes was a magical moment. Carolyn watched as the filly struggled to take it firsts steps. She spent time rubbing the filly all over to get her use to the human touch, talking to her as she did when the baby was still in her moms belly. As time went on, Carolyn and Tory became the best of friends. Then the bad news came. The owner of Tory had her tested for HYPP, a disease that her father carried. Tory came back positive. The whole fact was, we were all in denial that this disease would affect our lives the way it did.

I had read a lot about HYPP and how with diet control it is a manageable disease. I researched online, contacted AQHA for information and found a vet that specialized in HYPP. Feeling that I had researched the disease from all angles we decided to purchase Tory just before her first birthday. Carolyn had no idea what we had done. Torys owner handed Carolyn the lead rope and said, "Tory is home now, she's yours!". Carolyn went nuts, crying, jumping up and down, hugging us, then telling Tory that they will never be separated again.

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Dream Colt from 1999

This story is about a dream of ours that came true, last June 1998, we bought our first horse, and her colt, at the time the colt was 4mo old, the mare was 6yr old, both out of impressive, (we didn't know anything about impressive, much less hypp!) from little old people in there 70's,that had been around horses all there lives.

The colt became ill in a short time, we called the vet, his assumption was correct, he drew blood on both the mare and colt, the mare was n/h, but the colt was h/h, his attacks became worst, and more often, finally March 3,1999, his attack lasted 8 
long hours, foaming at the mouth, stumbling and falling, loud breathing, gasping for his last breath, his eye's so red, that we thought they were going to burst into flames, seizures, muscle tremors, finally the vet said we have to put him down.

I held the halter while he overdosed 
stiffly, and he fell to the ground.

The previous owners wouldn't do anything! Now with him gone we learned the hard way, don't you make the same mistake, as for a n/h mare the heat cycle, can trigger an hypp attack, making her unsafe to ride, TRUST ME WE KNOW!

HYPP Attack Video

Below is the information provided by the mare's owner. If you have trouble viewing the video on a dial-up connection, you have permission from the mare owner to right click on the video and save it on your computer. DSL viewers should not have any problems with it. The actual footage had to be edited from an hour down to 1 minute in order to be able to upload this file.

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HYPP in Pregnant Mares

I have been raising, breeding, training and showing horses for about 25 years. I started with appys and moved into QH's and paints just about the time the whole HYPP can started to open up. In the beginning of the controversy, few people took a stand against breeding these horses because we still knew very little about the defect. I started out with a couple of really good mares, in foal to a son of Mr. Impressive.

One of my resulting 
babies was a dark liver chestnut filly who was possibly the toughest, meanest mare I ever owned. But...I loved her. She went on to win several futurities as a weanling and got attention everywhere she went. She grew up to be a beautiful, 15.3, 1300lb mare. I broke her, rode her everywhere. She did well as a snaffle bit horse and went on to be an excellent junior horse. 

Last year I took her Moose hunting and she packed wild game for the first time. I brought her and my moose home on a Friday and Saturday she stood Grand at one of our local QH shows. Some mare, huh? She suffered from a few very mild episodes over the years but never anything treatable. Finally, I made the decision to breed the mare.

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Letter from Dr. Sharon Spier, DVM., PhD

Letter From Dr. Sharon Spier, DVM, PhD*
From :  Sharon J Spier < This email address is being protected from spambots. You need JavaScript enabled to view it. >

Sent :  Sunday, 14 December 2003 3:08:03 p.m.
To :  "Diane" <>
Subject :  Re: HYPP Testing

Dear Diane, Thank-you for your question.  I will try to explain.  The
genetic test is not specific for Impressive or any other bloodline. 
The test is 100% accurate for the mutation that causes HYPP, and to
date, only this mutation, and  the disease, HYPP, have been
identified in descendants of Impressive. 

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Mandy and Ninety Boy

As I write this email, its hard to hold back the emotions from the sudden death of my 15 year old beautiful, healthy, vivatious gelding.  Impressive 1990 a/k/a Ninety Boy, somewhat of an antique for this day and time.  His breeding, conformation and heart was nothing short of "Impressive" - Sire: Impressive; Maternal Grandsire: Tardee Too.
 I have owned Ninety since December 1999.  I bought him knowing he was N/H as his previous owner had him tested.  Nevertheless, I educated myself on care for these "special" animals.  I would consider Ninety to be a moderately affected N/H horse.  For the most part, we controlled his attacks with diet, exercise, daily turnout, etc.
 Over the five years I have owned Ninety he has done everything I have asked of him.  I purchased Ninety for a safe first horse project and he has given me five good years as a friend, companion and competitive show horse.  During those five years, the suffering he endured during his attacks (a few of which were SEVERE) tore my heart apart. 

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Myths and Facts about HYPP

Myth: "I have to have an HyPP positive horse to compete in halter."
Fact: There a very large number of horses past and present who have done very well in the showring without having this disease. Many are Impressive-bred N/N horses, as well as horses who carry no Impressive blood at all and cannot carry this disease.

Let's dispel more myths...Myths...

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