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    Re: [RC] Rice Bran questions again? (Long response--feeds class is in session!-part 1) - Susan Garlinghouse


    >contributing oil as well..  Adding more corn oil may push >you beyond a
    safe level--I'd have to see how the fat >percentage of the total diet worked
    out to say for sure.
    
    Your ruminant nutrition background is showing, Lisa.  You'd be okay from
    that standpoint for horses, though of course, it'd be way too much for
    ruminants (for everybody else, ruminants like cows and sheep can't tolerate
    more than about 5% fat in the diet due to the differences in the arrangement
    of the digestive tract).  You can technically add up to around 30% fat to
    the equine ration, although more than around 10% becomes a management
    problem, rather than a nutrient or fiber digestibility issue.
    
    >I do notice they point out natural source Vit. E and that it's better
    utilized than synthetic. Unless I've missed something somewhere, that's a
    sneaky tactic (I've seen it used by a former employer, and I didn't buy it
    there, either)...activity. <snip> In other words, bragging about "natural
    source" is to me a marketing ploy, but I'm a little biased when it comes to
    marketing tricks.
    
    You and me both.  I worked in advertising before I went back to school and
    having been one of the people that wrote the marketing pitches, I can see
    them coming a mile off now.  Anyway, I agree with you about the synthetic vs
    natural sources for vitamin E.  There's also some noise about the natural
    vitamin E in rice bran being more potent, but nobody's come up with real
    data so far.  I asked for some once and got faxed 14 pages of pretty
    pictures of what a rice kernal looks like and a lot of kindergarten
    explanations that boiled down to Vitamin E and You, but no actual data.
    
    It's worth mentioning though that natural-vs-synthetic for vitamin E is one
    thing, but something else for vitamin A.  There is some (real) data that you
    can feed synthetic vitamin A to broodmares and still get a vitamin A
    deficiency.  The nice thing, though, is that green grass is just full of
    "natural" vitamin A precursors, so doesn't have to be provided through
    anything fancy-shmancy.
    
    >it is an organic compound that can bind phosphorus and >zinc.  Nonruminants
    can't break that bond because they >don't secrete the enzyme phytase.  It is
    a bacterial >enzyme.  Horses, of course, do have hindgut >fermentation (bugs
    in the cecum), so they can deal with >it to some extent, but I suspect that
    the amount of >phytate-bound mineral released and absorbed is less >than
    that in ruminants because this takes place after the >feed leaves
    
    I'd thought about that, too.  KER says the phosphorus in rice bran is fairly
    available, much more so than the P in wheat bran.  Haven't seen data, but
    willing to take their word for it (alot of other places, I'm not).
    Susan G
    
    
    
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    Replies
    [RC] Rice Bran questions again?, JUDYK89
    Re: [RC] Rice Bran questions again? (Long response--feeds class isin session!-part 1), Lisa Redmond