HD in Genetics - Page 1

 Hi Everyone ,

More research for my future puppy.....

I have been looking at blood lines (primarily German, Czech, some Slovak) and their hip ratings. 

How far back (third, fourth, fifth generation) do I need to focus to be sure that the dog (progeny) should x-ray with excellent or good hips and elbows?

Which working sires and dams have been known to produce the excellent or good results?

Note:
I realize that there are many factors to consider when looking for the ideal dog (in my case a SAR Dog) but I am trying to get the answers to my questions one topic at a time.

Thanks for your input.

C

Not just a matter of how far back, but also how "in depth" you look. Not just looking at the direct ancestors of the pedigree and how they've produced, but also looking at how those ancestor's siblings have produced with their progeny.

Consider how much of your research is reliable evidence, i.e. can be verified from an official and credible source. Examine actual xrays yourself, of any of the dogs you can find them for. Take into consideration the radiological method that was used to grade their hips, the differences between them, weaknesses and strengths. For example, the SV's A stamp system grades hips at only 1 year age, before full skeletal maturation.

You'll in the end probably have to make a weighted decision, because there may be gaps of insufficiently verifiable information. If hips are a strong concern in your decision, you might consider originating your search from the start by selecting a breeding that decends from producers of a bloodline that represents a long succession of the most comparitively successful hip production results.

If you allow for any compromises in producers with less than best backgrounds, try to do so on only one side of the pedigree. For example, four a3 hip producers in the pedigree on only one parent's side, is likely better than only two in the pedigree, when one is from each parent. It's desireable to reduce your chances of homozygous pairings of detrimental alleles.

I've produced hundreds of pups, none resulting in HD, but I've always been mindful of emphasizing it's importance. This is why I don't explore too relatively far from only a few select bloodlines, and my future breedings will continue to gravitate toward those lines. If presented with a choice, I would sacrifice a measure of working ability, if it meant extending a healthy and fit life.

pups are a crap shoot. no matter the lines, or the parents, any dog can produce HD.

if you are soo concerned with hips, by an older puppy already prelimbed.

actually blue is a recessive gene, not all dogs carry for it.

HD is more than just a recessive gene, more factors come into play.  saying you've produced 100s of pups and no HD is a little deceptive too.  is every pup you produce screened?  most breeders are lucky to get a couple from each litter they produce screened.  most buyers, unless they work/breed their dogs, do not screen for HD unless theres a problem to begin with.

and yes, any dog can produce HD, even the best hip producers in the world.

if someone is truly worried about HD/ED in a future working/breeding prospect the best advise is to purchase an already screen older puppy.
 
no gaurantee in the world can prevent HD.

You're saying every dog is a carrier for HD, and I'm disagreeing.

You're saying all pups are a crapshoot, but that's what  selective breeding is all about.

I'd like to know what testing method you use Ehret.  you must have one of the best records of anyone I know on producing good hips and elbows.

I can only find 2 dogs on OFA with your kennel name, and 1 has bad elbows.

in my near 20 yrs, I have produced probably 30-40 puppies, and I know of 2 who the owners went ahead and checked.  all the rest, even with my hounding them, have never had the pups x-rayed.

You're changing the subject, and not at all focusing on what I disagree with you about.  I didn't say I OFA'd hundreds of offspring.  The ED was the 11th pup of a litter, a runt that was unproperly developed and was going to be put down.  Instead, was given to the vet tech who wanted it instead.  Still "none resulting in HD" is not untruthful, nor deceptive for me to say.

I can easily say I've never produced a dog with HD then.  not checking is not the same as not producing it. 

but I guess out of sight, out of mind.

still the best bet is buying an already prelimbed dog.  alot of time and money can go into a SAR dog, and what a waste it would be for someone to spend 6 months to 2 yrs working a dog then finding out it has HD.  no dog is immune from producing this problem.  you can give yourself a better chance by selecting from certain breedings, but in the end, its never a guarantee.