I bit the bullet and bought a year of Feed XL. Currently don’t have test results for my hay so just using “good” and “average” as I play around.
On our current diet incorporating a senior feed, AND on a possible future diet moving to alfalfa/tim cubes and a ration balancer, she’s showing up as at 50% levels of needed Vitamin B1 and about 80% of Vitamin E.
The program does do a good job of explaining possible side effects of these deficiencies, but I was surpised to see the using a commercially prepared feed.
In your experience, what is the best way to supplement in those areas, is supplementation really necessary? Aged mare needs a bit of weight on (as always) but is otherwise in good health since coming home to live with me a year ago (self-congratulatory pat on back). Health has dramatically improved, as has horn quality etc.
Grass is now gone, of course, so I’ve put in the “pasture” as overgrazed and poor quality, so perhaps that’s where the deficiency comes from?