Blood glucose after Carbo charge

[Sarah Ralston <ralston@AESOP.RUTGERS.EDU>]

ti wrote:
 In actual practice, the duration of the glucose curve 
using carbocharge or grain is the same. Both peak at two hours. Bot apprach 
100 at 4 hours. Both experience a little bump upwards at 4 hours, then settle 
to fasted levels at 6 hours.

How much grain were you comparing this to? In our horses that are sedentary
and therefore not
experiencing increased glucose utilization, 2 to 3 lbs of concentrate (and
I have tested sweet
feeds, pellets and extruded feed in a wide variety of horses) are usually
back to or near 
fasting levels by 4 hours. In Laurie Lawrence and Skip Hintz's's work in
exercising horses
 fed corn before exercise blood glucose was below normal after 3200 meters
in the horses 
fed 1 and 2 kg corn, with the horses fed 3 kg at least not dropping below
normal but still
dropping precipitously (the fasted horses blood glucose stayed steady
throughout). I find it 
extremely hard to believe that 4 ounces of a complex carbohydrate would
result in elevations in blood glucose over 100 for 4 hours-and, if this is
true, 
why do you find that you have to repeat the doses every two hours or less?
Remember
that normal blood glucose in horses is only 60-90 mg%, lower than normal
humans.

Sarah


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