Thanks again for all the advice!
I’ve ordered a High Country Plastics Jr. Slow Feeder, so she can have constant access to grass hay in that. I’ll request that the barn give her a flake of alfalfa in the AM and PM. Grain feeding is at noon, and I’m trying to decide the best options there. Leaning towards putting her on Smart GI Ultra for a couple months, then hopefully dropping back to regular Smart GI. Possibly changing out the Renew Gold for some alfalfa pellets and adding the solidified CocoSoya to her SmartPacks. Going to swing by CostCo tomorrow and pick up some generic Nexium to keep on hand in case of stressful periods or recurrence of symptoms. Aloe juice will be an option once temps warm up in the spring. As to my original question, I’m not planning to feed liquid oil at all.
Hopefully that will take care of it. Although she didn’t have obvious symptoms outside of the recurrent colic episodes, she does seem a little perkier and happier after several days on GastroGuard.