Onefasthorse - I agree with you. My farrier may well be trained to put shoes on (I will ask her next time she comes) but she is very much into her natural horsemanship and likes horses to be barefoot if possible. I don't think that just because she only does barefoot trims that this in any way means she is not good at what she does.
At the moment his diet consists of restricted grass - I keep him in a race set up with not a lot of grass and let him into a pasture with longer grass for an hour or two every day. Then an evening feed of lucerne chaff. Only a couple of handfuls so I can get his hoof supplement into him. He is also getting MSM and magnesium daily since he gets a little stiff being an older gentleman. What does NSC stand for?
NSC is sugar+starch levels in feed. Whole grains such as oats, corn, barley, etc are VERY high in NSC. Diets high in NSC have been proven to cause long term effects on horses such as laminitis, founder, gastric ulcers, hindgut acidosis, IR, obesity, excess energy (bad behaving/hot horses), etc. I stick with feeds that are under 15% NSC. For example: Oats are around 50% NSC, Purina Strategy is in the high 20%.... scary huh? Think of it as feeding your child a snickers bar for every meal.
Your horse is most likely not getting adequate nutrition. If he is an easy keeper and hold weight easily (which is sounds like he does) then a RB would benefit him greatly. RB's (ration balancers) are highly concentrated and low calorie. They are meant to be fed at a very low feeding rate (about 1lb per day per 1,000lb horse). Both of my horses are on a RB (Buckeye Gro N Win) and free choice hay/pasture. They each get 2.5 cups of feed a day... that's it. They are fat, healthy, happy and sassy. The NSC content in the Gro N Win is only 13%. It contains no whole grains and is a fixed forumla feed unlike brands such as Purina and Nutrena. Purina and Nutrena have low cost formulas which means that not every bag will be 100% the same. They swap out ingrediants for whatever is cheapest at the time. Not my cup of tea. I stick with the fixed formula brand. Every bag is the same all the time no matter what. Some of these brands are Buckeye, Triple Crown and ADM.
I saw positive hoof health changes about 5 months after I switched my horses over to the Gro N win, but my mare still can't go barefoot. Next I am going to try the Simmerdown supplement.
If I were you I would get rid of the hoof supplements your feeding (most are a waste of money). Keep up the MSM and mag, put him on 1lb (2.5cups) of Buckeye Gro N win and order a bucket of simmerdown and start him on that.
In 6months, I bet you see a HUGE change.