Why is clover poisonous to cattle?
Andrew Mccoy
Updated on January 10, 2026
Sweet clover contains a high level of a chemical that can be converted to an anticoagulant. Improperly curing hay made from certain sweet clover varieties such as white and yellow sweet clover can cause severe and often fatal hemorrhages in livestock such as cattle, sheep and goats.
What happens if cows eat clover?
A cow eating spoiled White Sweet Clover can develop a fatal hemorrhagic disease. Blood vessels in the animal's body burst and cause internal bleeding. The reason is that the clovers contain coumarins. You may recognize the chemical for its use as a medicine to reduce the risk of clots in humans.Can cows graze on clover?
Grazing cattle on sweet clover, yellow clover, and white clover puts them at risk for sweet clover poisoning. Avoid feeding moldy sweet clover hay to cows within 2 weeks of calving to reduce the risk of abortion. Bloat is another concern with grazing legumes and clover.What clover kills cows?
Know the causeAs the foam builds and traps more bubbles, the rumen expands into visible bloating on the left side of the animal. Unrelieved, it can kill by cutting off the animal's ability to breathe. Alfalfa, red clover, and white clover are the most notorious legumes for bloat.
Why do cows get bloat from clover?
Clover has high levels of foaming agents", which assist the rumen gas to form numerous small gas bubbles in the rumen as the digestion occurs. These make it very difficult for the cattle beast to belch so the gas just continues to build up in the rumen.What happens when cows eat too much clover?
Why can't cows eat alfalfa?
Why does alfalfa cause bloat in the first place? Soluble proteins in forages and other small particles within the cells of the plant are rapidly released once they reach the rumen. These proteins and particles are attacked by slime producing rumen microbes, which cause a buildup of stable foam.How do you Debloat a cow?
Treatment
- Passing a stomach tube is the best treatment for gassy bloat. ...
- In a few cases a trochar and cannula punched through the side into the rumen will relieve gassy bloat when a stomach tube has not worked. ...
- For frothy bloat, antifoaming agents that disperse the foam should be given by stomach tube.