Ulcers, pasture, and alfalfa......

Are all hays and pastures effective at ulcer care/prevention? I have started treating one of my guys for ulcers (using Abler poprocks) and it seems to be working. However, he is an easy keeper and I have switched to timothy from the O/A I fed during the winter. As the grass comes in I expect to reduce hay down to nothing - he lives out on good pasture 24/7 (of course if he has to come in - farrier, etc- there is hay in the stall).
I know alfalfa is the preferred hay for ulcery horses - but he really does not need the calories.
Am i doing him a disservice? If so, any suggestions? I can’t feed him any less - he gets just enough to hold his supplements as it is!! (plus and equalizer for the missing nutrients). He’s pretty picky about grain so I don’t think going to a straight hay balancer type program would work.

And before you ask, no not scoped but behavoral changes pointed to ulcers. And I am putting some cocosoya oil on his grain to hold the poprocks - otherwise they would be at the bottom of the bucket.

I would think 24/7 pasture would be a good prevention for ulcers

24/7 pasture feeding should be ideal. Take a look at this article:

https://www.chronofhorse.com/article/fix-it-feed-part-4-prevent-ulcers-mimicking-nature

If he has good grass grazing is great for ulcers. One of my mares that had ulcers and is very prone to them, s a very hard keeper, she gets alfalfa as well as grass hay and grass, but if she were an easy keeper I would not feed the alfalfa. If I didn’t feed her the alfalfa she would have to get a ridiculous amount of feed and I prefer more hay over tons of grain.

24/7 hay/pasture is a great ulcer preventative, no matter the type of hay.
Alfalfa is preferred because of it’s higher calcium content, which buffers stomach acid.

And yet he has lived out 24/7 for the last year plus… (as an aside, today’s training went very well. One week on Abler poprocks…)

It’s not really a preventative like a vaccination would be a preventative. If he has ulcers, the poprocks won’t fix them. They may be mitigating the effects.

No preventative, not even vaccinations, are a 100% barrier.