Of course long stem fiber is always better, unless they just can’t do it. If your horse is thriving I wouldn’t worry. I won’t even tell you how many lbs a day my 25 yo TB gets. People on this board would faint. He’s a cribber who doesn’t have the best teeth, he’s a super picky eater, he’s a true 16.2 and he has the metabolism of Michael Phelps in Olympic training. I feed what it takes to keep his weight where it needs to be. I just thank God I’m married to the feed dealer or I wouldn’t be able to afford it! :lol: I should also point out that he doesn’t have metabolic issues (other than his metabolism being set to full-on hellfire furnace!).
For what it’s worth, mine is also mostly on Kalm N EZ which is a beet pulp based feed, with soy hulls, wheat middlings and alfalfa meal which are all high fiber ingredients. To me, there is a difference between a forage-based feed like Kalm N EZ and “grain” or grain-based feeds. Although Tribute doesn’t promote Kalm N EZ as a complete feed, several of our customers use it as one with great results.
If you’re concerned about NSC, always do the math.
12lbs of 20% NSC feed = 2.4lbs of NSC
20lbs of 15% NSC hay = 3lbs of NSC
So if you can’t find a low NSC hay that he eats and that provides sufficient calories to maintain his weight, your current plan sounds like it’s working just fine. Having said that though, as JB pointed out, there are lower NSC options than Nutrena Senior, and I’m not a fan of non-fixed formulas. Plenty of people use it and have healthy horses though.