1. EquiPride and Omega-3 Horseshine aren't even in the same feeding ballpark. EquiPride is a vitamin/mineral supplement with a pre-probiotic in it. Omega-3 Horseshine is flax.
2. Most horses won't appreciate the transition from some other type of feed to EquiPride, so it has to be done gradually -- which that should happen anyway.
I mix EquiPride with rice bran and my horses love it.
EquiPride is meant to be fed to forage horses, not horses that are eating a bagged feed that already has vit/min in it. If that is what the OP is doing yes it is a big waste of money.
No offense to the OP's vet but he needs to get on line and look at the G/A analysis for EquiPride before he makes the iffy comments he made.
While it might not be "the ticket" for every horse, how funny that all four of my horses are on it and are healthier now than they've ever been. Winter coats glisten in the sun and so do their hooves. MY vet says "keep doing what you're doing" and he gives my horses physicals twice a year. I have fed EquiPride for over four years.
I drive 92 miles ONE WAY to get it, buy a year's worth and keep it in the spare bedroom. I get a big honkin' discount buying 20 bags at a time and even driving the dually up there, I still save $177/annually.
I started buying it for my senior metabolic horse but put all the horses on it to keep my life simple. They all get pelleted rice bran with it (I am not a fan of beet pulp).
The sidebar to EquiPride, meaning my two horses that are not metabolic, is that it has stopped the Arab's runny bums by about 98% and he now only gets them a little on spring and fall grass right after a rain.
It has completely stopped another horse from chewing wood which is a good thing, because all the Chew Stop in the world wasn't working and he was on his way to chewing the barn and overhang down.
So, after 4+ years of feeding four horses, none of which are "normal" and seeing the phenominal health improvement in all of them, I am a fan and will continue to drive 92 miles one way, annually to get the stuff
If the OP wants to try a bag, I would try it as long as the horse isn't getting a bagged complete feed or a ration balancer that has vit/min in it.
Again, I hate to trump the OP's vet but sorry, the horse most certainly can have mild gastric ulcer issues and not show a lot of pain. Like people some horses tolerate that discomfort better than others.
My Arab with the runny bums also has suffered from mild gastric ulcers for 7 years. While the EquiPride has also helped that a lot, it was not good enough. I started feeding him well soaked timothy/alfalfa cubes and have been able to take him completely off Ranitidine.
For him the calcium carbonate in the alfalfa (that's what Tums are) was enough to kick his tummy up another healthy notch.
He is 25-1/2 years old and becoming a hard keeper so feeding him 3 - 4 pounds of tim/alfalfa cubes daily does him more good than harm. He needs the amino acids to help maintain what little muscle he has because he's never had much to begin with.
Hope this helps