White Muscle Disease in Cows: Selenium and Vitamin E Deficiency in Calves
- See your vet immediately if a calf is weak, stiff, struggling to stand, breathing hard, or not nursing well.
- White muscle disease is nutritional myodegeneration caused by selenium deficiency, vitamin E deficiency, or both, most often in young, fast-growing calves.
- The disease can affect skeletal muscles, the heart, or both. Mild cases may recover with early treatment, but severe heart involvement can cause sudden death.
- Diagnosis usually combines the calf's signs, herd history, bloodwork such as CK and AST, and selenium testing of whole blood, serum, or liver tissue.
- Treatment often includes vet-directed selenium and vitamin E supplementation plus nursing care, fluids, and treatment of complications like pneumonia.
What Is White Muscle Disease in Cows?
White muscle disease is a nutritional muscle disorder in calves, also called nutritional myodegeneration. It happens when a calf does not get enough selenium, vitamin E, or both. These nutrients help protect muscle cells from oxidative damage. When levels are too low, muscle fibers can break down and scar, especially in fast-growing young animals.
In cattle, selenium deficiency is often the bigger driver, although low vitamin E can add to the problem. Many affected calves were born to cows that ate selenium-deficient forage during pregnancy. That means the problem may start before birth, even if the calf looks normal at first.
The disease can involve skeletal muscle, causing weakness and stiffness, or cardiac muscle, which is more dangerous. Calves with heart involvement may show breathing trouble, collapse, or sudden death. Early veterinary care matters because some calves improve well when treatment starts before severe muscle damage sets in.
Symptoms of White Muscle Disease in Cows
- Weakness or trouble rising, especially in young calves
- Stiff, short-strided gait or reluctance to walk
- Muscle tremors or a hunched, painful posture
- Difficulty nursing or swallowing
- Poor growth, lethargy, or spending more time lying down
- Rapid breathing or breathing effort, which can suggest heart or respiratory muscle involvement
- Sudden collapse or sudden death in severe cases
Some calves show mild weakness at first. Others decline quickly. A calf that cannot stand, is not nursing, seems painful when moving, or is breathing faster than normal needs urgent veterinary attention. Sudden death can happen when the heart muscle is affected, so even subtle signs in a high-risk herd should be taken seriously.
What Causes White Muscle Disease in Cows?
White muscle disease develops when calves do not have enough antioxidant protection from selenium, vitamin E, or both. Selenium is a trace mineral needed for enzymes that protect cells from oxidative injury. Vitamin E works alongside selenium in cell membranes. When either nutrient is low, muscle tissue is more likely to degenerate.
In many herds, the root issue is low selenium in soil and forage. If pregnant cows eat deficient hay, pasture, or grain, calves may be born with low selenium stores. Poor-quality or long-stored forage can also lose vitamin E over time, which raises risk further.
Risk is often highest in young, rapidly growing calves, especially where regional soils are selenium-deficient or mineral programs are inconsistent. Herd-level factors matter too. Inadequate trace mineral access, poor intake of free-choice minerals, and lack of monitoring can all contribute. Because selenium can also be toxic if oversupplemented, prevention should be planned with your vet rather than guessed.
How Is White Muscle Disease in Cows Diagnosed?
Your vet will usually start with the calf's age, signs, diet history, and the herd's mineral program. A weak or stiff calf from a selenium-deficient area raises concern, but white muscle disease can look like pneumonia, trauma, septicemia, clostridial disease, or other causes of recumbency. That is why testing matters.
Bloodwork often shows muscle damage, especially increased creatine kinase (CK) and AST. Definitive confirmation is usually based on low selenium levels in whole blood or low selenium in liver tissue. In calves that die suddenly, necropsy can help confirm the diagnosis and rule out infectious causes.
Your vet may also assess the rest of the herd, because one sick calf can signal a broader nutritional problem. Testing cows, calves, feed, or mineral supplements can help identify whether the issue is isolated or herd-wide. That herd view is important for both treatment and prevention.
Treatment Options for White Muscle Disease in Cows
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Budget-Conscious Care
- Farm call or herd-health consultation
- Physical exam of the calf
- Vet-directed selenium and vitamin E treatment when appropriate
- Basic nursing care such as assisted feeding, limiting exertion, and dry bedding
- Monitoring for nursing ability, hydration, and breathing changes
Recommended Standard Treatment
- Farm call and full veterinary exam
- Bloodwork for muscle injury markers such as CK and AST
- Selenium testing or herd-level mineral assessment when available
- Vet-directed selenium and vitamin E supplementation
- Supportive care such as fluids, anti-inflammatory treatment if indicated, and treatment of secondary pneumonia or dehydration
- Short-term recheck plan for the calf and herd mates
Advanced / Critical Care
- Urgent or emergency veterinary care
- Expanded bloodwork and selenium testing
- Aggressive supportive care for recumbent or severely weak calves
- IV or intensive fluid support when needed
- Oxygen support or close monitoring for respiratory distress when available
- Necropsy and herd investigation if sudden death occurs
- Detailed herd nutrition review with ration and mineral program adjustments
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About White Muscle Disease in Cows
Bring these questions to your vet appointment to get the most out of your visit.
- You can ask your vet whether this calf's signs fit white muscle disease or another condition that looks similar.
- You can ask your vet which tests would be most useful right now, such as CK, AST, whole-blood selenium, or necropsy if a calf has died.
- You can ask your vet whether the problem is likely limited to one calf or affecting the whole herd.
- You can ask your vet how to supplement selenium and vitamin E safely in your area without risking selenium toxicity.
- You can ask your vet whether pregnant cows, newborn calves, or both should be included in the prevention plan.
- You can ask your vet whether your current mineral mix, salt program, hay source, or pasture management may be contributing.
- You can ask your vet what warning signs mean a calf needs emergency recheck, especially breathing changes or inability to nurse.
- You can ask your vet how often selenium status should be monitored in your herd.
How to Prevent White Muscle Disease in Cows
Prevention starts with the herd, not the individual calf. The main goal is to make sure pregnant cows and growing calves receive an appropriate selenium program and dependable vitamin E intake. In the United States, selenium can be added to the total ration up to 0.3 ppm, and supplemental intake limits also apply. Because both deficiency and toxicity are concerns, your vet should help tailor the plan to your region, forage, and production system.
A practical prevention plan may include a balanced trace-mineral supplement, monitored intake of free-choice minerals, and attention to forage quality. Green forage usually supports vitamin E intake better than poorly stored hay. In some herds, your vet may recommend periodic selenium and vitamin E injections or slow-release boluses, especially in extensive grazing systems or known deficient areas.
Testing is what makes prevention reliable. Periodic blood sampling of at-risk animals can show whether the program is working. If one calf develops white muscle disease, it is wise to review the mineral program for cows and calves right away. Early herd-level correction can prevent more weakness, poor thrift, reproductive problems, and sudden losses.