Here's what I feel about my hard keeper most days when it comes to what to feed her vs. what she'll eat on any given day:
What we finally come down to was 1lb of Omolene 300 twice a day with a weight supplement (SmartGain 4 from SmartPak) and UGuard powder. With this combination, we were doing pretty well. Until about 3 weeks ago, when she started turning her nose up at the Omolene. Now she wants the Strategy I'm feeding everyone else.
She is 33.75" and 197lbs (as of a mid-July weight check on a portable scale brought to our location). She is *just* a 4 on the body score scale, in my estimation. She has a defined spine ridge and her hips don't have a nice rounded look to them like my other horses. Her ribs do not show.
We have tried many other things but she will walk away from ANYTHING in her bucket she descides she doesn't like (i.e., vegetable oil, beep pulp, molasses, rice bran oil, etc.). If she would eat it, I would have her on Purina's Ultium because of it's high calorie concentration. We can barely get her to eat the 2lbs a day that we're giving her. Trying to add more would be useless.
After 2 years of fighting this fight, I'm planning on having the vet come out to do some blood work in the next few weeks. Just to be sure there isn't a metabolic or other reason for this.
Also, I give her as much alfalfa mix hay as she'll eat. They have limited pasture time right now for a variety of reasons, but on days when the weather cooperates, I plan on putting her out there more than not. The rest of our herd though can't be out there all that time.