Ridecamp: Re: [RC] FYI

Of course any tampering with natural productivity rates conjures up
thoughts of the "Impressive Syndrome".

It also brings up the issue of the erythroblastosis fetalis problem that
seems to run in some Arab bloodlines.  For those of you that aren't familiar
with this problem, it's the technical term for Blue Baby syndrome (the Rh
factor problem) in humans.  I'm not exactly sure what protein is involved in
horses, but mares develop antibodies to a particular protein on the
stallion's red blood cells, which is frequently inherited by the foal.  The
mare's body puts these antibodies into the colostrum, so that what should be
life-saving ends up being deadly unless the foal is given serum and
prevented from nursing for at least 24 hours.  I've been on the treatment
end of a number of these foals because the Arab stallion in grad school
carried that gene and several mares reacted to it.  We weren't able to save
all the foals.

Just a side note, and maybe Heidi has some insight into this, but I noticed
that on of the mares with the antibody always had a red tinge to her serum
after her blood was centrifuged, and I wondered if perhaps there was a
connection to her carrying that antibody.

Lisa

----- Original Message -----
From: "Rides 2 Far" <rides2far@xxxxxxxx>
To: <lkinsky@xxxxxxxxxx>
Cc: <SandyDSA@xxxxxxx>; <ridecamp@xxxxxxxxxxxxx>
Sent: Tuesday, July 23, 2002 8:44 PM
Subject: Re: [RC] FYI


> this notion of ET. The Registry is
> > >now considering allowing a mare to technically if not physically >
> >produce more than one registerable foal per year
>
> I don't think it's exactly flooding the market with one bloodline...when
> you consider what one stallion is capable of doing...but things could get
> interesting. Read an article a few years ago where if I recall correctly
> they found that there were quite often multiple embryos and the mares
> must usually absorb the extras.  They managed to AI more than one mare
> off one breeding...which brought up the question of stud fee.  How many
> did they owe?  In a sport like endurance where registration isn't
> necessary the stallion owner wouldn't have much leverage to try to get
> the extra stud fee.  Could they just wait until the foals were born to
> decide which one to register with the paid fee?
>
> Of course any tampering with natural productivity rates conjures up
> thoughts of the "Impressive Syndrome".  But it still seems like stallions
> are more likely to have a widespread negative impact from overproducing
> their genes.  I don't worry much about the prospect that AI mares would
> contribute to unwanted horses.  It's too expensive for people to do it
> without wanting the progeny.
>
> Angie
>
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