<< Has anyone been feeding any of the commercial feeds that are 
low
protein/high fat like Manna Pro's Superhorse Elite 10?  I 
>>
It's hard to make conclusions about one 
feed over another, but just a few general comments (as we've already talked 
about privately a bit).  Yes, extruded feeds are higher in digestibility, 
though not nearly as much for horses as they are for the simple-gutted critters 
like dogs, pigs and humans.  So there is some advantage to feeding a 
"cooked" feed (which is what extruded feeds are, of course), but not necessarily 
enough to justify a tremendous increase in price, or in making a tremendous 
effort to only provide cooked feeds.  Also, the advantage to be gained has 
to do with the type of starch used.  For example, you won't get any 
advantage in cooking a grain like oats, because oats are already so digestible 
for the horse, cooking doesn't increase it.
 
Corn, on the other hand, does benefit by some heat 
processing.  The primary advantage to this is that a lot more of the 
glucose is absorbed in the small intestine and less gets flooded into the cecum, 
thus decreasing the likelihood of cecal acidosis and other associated Bad 
Things.  John, when you and Willy measured glucose spikes during exercise, 
this *might* be one explanation for a more level glucose spike you saw with the 
Manna Elite.  It could also be explained by the use of oats in the formula 
(which tend to produce a more even glucose curve), by the use of fats or beet 
pulp, or a combination of all of the above.  I haven't seen the ingredients 
list, so I couldn't say.  From John's comments, it sounds like the Elite 
contains a lot of corn---and if I were going to feed a high-corn ration, then 
some form of heat processing is some advantage.  Enough for me to pay more 
than a few dollars more than for a good quality grain mix, probably not.  
Well, if I were really competing hard (which I don't)...maybe.  
 
I agree with John's comments about convenience 
carrying it in a baggy and so on, and y'all already know I just love hearing 
about riders that carry any feed on the trails to hand out to their horses 
between vet checks.  I also perked up my ears about John's Icelandics 
getting a tad colicky, possibly from too much undigested carbos passing through 
the small intestine and into the cecum.  It may have shown up with John's 
ponies, but is a concern with any horse, so this is definitely a feed to provide 
in small and frequent amounts, and not just banging down ten pounds in front of 
a horse and walking away.  But I agree with John that the Manna is probably 
a (slightly) better choice from a colic perspective than for unprocessed 
grain.  Not much, though.  Being a very concentrated feed, it's not 
going to do much to maintain gut motility, so making sure a horse gets some 
grazing or hay at and between checks as well is a big issue.
 
 More about John's comments (cuz I know he 
won't mind my using his post as a template) :-).  Anyone else in California 
that doesn't feed alfalfa, I wouldn't be concerned about the stuff being 
formulated for alfalfa rations.  The primary difference is only going to be 
in the calcium and phosphorus contents, and as long as you're not feeding a 
straight orchard grass ration, you'll be okay.
 
OK, about the Flint River mix you mentioned.  
I'm not specifically familiar with this brand, either, but you mentioned that it 
was formulated under the direction of the nutrition people at Univ of KY.  
That would be mostly Laurie Lawrence's lab and that's an *excellent* equine 
nutrition group.  Probably the best in the country IMO as far as 
rock-solid, basic this-is-what-works knowledge, especially in the areas of 
availability of vitamins and minerals.  The data about beet pulp increasing 
hind gut fluid reservoirs came out of Univ of KY.  Anyway---if they worked 
on the formulation, it's good stuff.  If you don't know by now I like 
beet-pulp based feeds, you've been hiding under a rock, and apparently this mix 
is beet pulp based.  So I wouldn't have a single quibble about your using 
this feed, either.
 
Between the Flint mix and Manna, I think the 
deciding factor has to be up to you.  Do your horses eat well at vet 
checks, and do they prefer one over the other (you already mentioned your 
stallion is still suspicious)?  Are both readily available year round in 
your area?  Are either/both bags date stamped so you can check to see how 
long the bag has been on the shelf (always an issue in a high fat feed in hot 
areas).  Whats the difference in price, and are you going to be feeding 
enough that an extra dollar a bag is really an issue?  Are you going to be 
doing any cross-country traveling where the Manna might be easier to find than 
the Flint?
 
Well, that's enough rambling. :-)  Hope this 
helped a little.
 
Susan G