Alli almost certianly has ulcers. Never had her gastroscoped but my vet said she's about 99% sure it is ulcers.
However Alli doesn't display the 'typical' signs like the ones you said above other than that she windsucked like a deamon! Well she used to anyways before I put her on alfalfa instead of striaght barley (old owners feeding reigeme, not mine haha) and she's done amazing out of it. Super coat, healthy condition, and WAY less windsucking indicating the pain from the ulcers is dying down. Any kind of behaivour that releases endorphins (happy hormones which act like pain killers) like winducking, rolling, scratching continuously etc, or distracting behaivoirs like pacing, cribbiting, pestering other horses, could indicate stomach distress.
Whats your horses behaivour like normally and has it changed, even slightly, in the last month or so?
We lose ourselves in the things we love, we find ourselves there too ~Kristen Martz