Berg OilBerg Oil is a traditional remedy that helps control excessive fermentation and decrease gastrointestinal discomfort in horses, cattle, and sheep. The combination of wood tar, gum turpentine, and methylated spirits has been used for years to reduce gas production and is reported to have calmative properties. Its use can also help reduce sudden muscle spasms, colic pain, and functional discomfort from gastrointestinal fermentation.