RE: [RC] where is selenium high/low? - Susan E. Garlinghouse, DVM
I think 10 mg a day is a good starting point, but you really don’t
know the optimum levels for an individual horse until/unless you run selenium
assays to get it dialed into a good level. The horse I mentioned in an
earlier post that went from multiple non-completions in 25s and 50s prior to
supplementation, to good finishes in multiple 100s, including Tevis and I think
either BH100 or Ft Howe100. The first 60 days, that horse got 50 mg of
selenium yeast a day, which many who consider a ‘toxic’ dose, but
was what was needed for this individual to get whole blood levels up over
200. Heidi likes injectable Se, I prefer sticking to oral if at all
possible, being a big chicken at heart, and this horse responded well to oral
alone, if more slowly than injectable would have taken. There were some
other specific details that also made injectable a less-than-ideal choice, but
that’s irrelevant to this thread. Later the daily dose went down to
30 mg a day during the riding season, and around 15-20 mg a day during the off
season, and the horse continued to do great until retirement.
Come to think of it, I remember seeing a post that “he”
was now the proud mommy of a nice filly, so I guess “he” was
actually a mare. If not, then the extra selenium really did do some
marvelous things for his reproductive efficiency as well as performance.
<g>
Susan Garlinghouse, DVM
From: M. Paul Latiolais
[mailto:latiolp@xxxxxxxxxxxxxxxxx] Sent: Friday, February 08, 2008 6:59 AM To: suendavid@xxxxxxx Cc: * * Subject: Re: [RC] where is selenium high/low?
Susan,
I was going to ask this question at Convention, but since it
was brought up....
As you may remember, hay in Western Oregon is low in
selenium (mean .274 ppm with an sd of .15 ppm in my county). At the last
PNER convention you attended, I THINK You
recommended supplementing 10 ppm selenium for endurance horses, which
is twice the "standard" recommendation. Is my memory correct?
And is that still your recommendation?
You can put me off until convention if you like. I can
ask then.
