If she maintains a healthy weight on a mostly hay diet, then I would put her on a quality vit/min supplement mixed in with the beet pulp, or put her on a quality RB (ration balancer).
I use a RB. I use Buckeye Gro N Win. It is 13% NSC which is low. I will feed anything under 15% NSC. Triple Crown 30% is a RB and has higher levels of vit/min so you can actually feed less of it than you could of GnW. Plus, it is 9.3% NSC.
There are 3 feed brands I will use. Triple Crown, Buckeye and ADM. All three of these companies have fixed formulas. Companies like Purina & Nutrena have low cost formulas, which means that not every bag will be the same. They swap out ingredients with whatever is cheapest at the time. Fixed formula is just that; a fixed formula. Every bag is the same. It doesn't change.
IF Purina is easiest for you to find, you can feed their RB. I know quite a few ppl who do feed it and are happy with it. I believe their RB is Enrich 32. The Enrich 32 is 16% NSC I believe. Low, but there are others that are lower.
RB's are not "grain." They do not contain any cereal grains (corn, oats, barley, etc). This is why they are low NSC (starch/sugar).
It is a good idea to read the ingredient list on potential feed purchases. Just like human labels, the ingredients at the top are the most prevalent. If the ingredient list starts with corn, oats, molasses, barley, etc... then move on b/c it's going to be a high NSC feed. (actually, move on if any of those are present) Look for things like soybean meal, alfalfa meal, distillers grains (the way they are processed cooks all the sugar/starch out), flax, etc.
I just bought a slow feed net that fits a square bale in it for my feeder.
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Last edited by OneFastHorse; 01-23-2013 at 12:28 AM.