In the meantime, here’s a link and and some info regarding chewing time…https://kppusa.com/tips-and-topics/chewing-important-part-horses-life/
From the article…
[I][B]Saliva contains bicarbonate, which works to buffer the stomach acids that are produced continuously by the horse. When chewing is limited, gastric acid accumulating in an empty stomach can cause ulcers. The time spent chewing plays an important role in the both the health of the digestive tract and the proper absorption of nutrients.
The type of feed a horse eats greatly affects the time spent chewing. A horse takes about 40 minutes and chews between 3,500 and 4,500 times to consume a thin, two-pound flake of hay. On the other hand, two pounds of oats requires as few as 850 chews and can be consumed in about 10 minutes! Diets high in concentrates (grains/pellets) and low in forages reduce chewing time and disrupt healthy digestion.[/B][/I] [h=4]The type of meals you feed affects chew time[/h]
[I][B]Optimal time chewing: 16 to 17 hours per day
Meal: 18 lbs of hay (nine 2-lb flakes) and no concentrate
Estimated chew time: 360 minutes (6 hours)
When fed 2x per day = 12 hours of chewing
When fed 3 x per day = 18 hours of chewing
Meal: 14 lbs of hay (seven 2-lb flakes) and 2 lbs concentrate
Estimated chew time: 290 minutes (almost 5 hours)
When fed 2x per day = 9 3/4 hours of chewing
When fed 3x per day = 14.5 hours of chewing
Meal: 8 lbs hay (four 2-lb flakes) and 4 lbs concentrate
Estimated chew time: 180 minutes (3 hours)
When fed 2x per day = 6 hours of chewing
When fed 3x per day = 9 hours of chewing[/B][/I]
I’ve found similar results on our horses when checked. It was also interesting how chew time was almost 50% longer for our fat/fiber pellet as opposed to our ration balancer.
The results are our justification as to why we put the amount of effort we do into sourcing the best quality forage we can find, as opposed to just increasing the concentrate to make up for missing calories.