All very good ideas. You may also ask your vet to check for ulcers and do a regimen of omeprazole. Belly sensitivity is not always about training. Because they are a thinking animal, they can think their way into an ulcer. Five days into my QH geldings treatment, he seems calmer and is not so reactive in his sides/belly. Review the stresses its been through, new training, not in a herd, stalled for long hours, riders stresses – all add up.