We’ve got 2 horses at home and today we let them out to graze. I saw my 7 year old quarter horse mare laying down on her side earlier but she got up. I later got a phone call saying she had been laying down again like 2 or 3 more times on her side. So I rushed home and got her out to walk her around. Her belly is tight and she would periodically do what I would describe as a belch or burp. It smelled foul. I could also hear her belly rumbling. She will eat but isn’t wanting water. Has anyone experienced this? I’m hoping it’s just an upset tummy but the fear of colic is there. Please help!