Mange in Cows

Mange in cows is a skin disease caused by mites. These parasites are tiny, but they can create major irritation, hair loss, crusting, and skin thickening. In cattle, the main mite groups linked with mange are Sarcoptes, Psoroptes, Chorioptes, and Demodex. Each one behaves a little differently, so the pattern of skin changes can help your vet narrow down the cause.

Some mites burrow into the skin, while others live on the surface or in hair follicles. That matters because burrowing mites often cause more intense itching and faster spread. Sarcoptic mange often starts on the head, neck, and shoulders and may involve the whole body within about 6 weeks. Psoroptic mange tends to affect the back, flank, and tail base. Chorioptic mange often starts around the lower legs and can extend to the udder, scrotum, tail, and perineum. Demodectic mange is usually less itchy and may cause nodules, abscesses, or draining tracts.

Mange is more common when cattle are housed closely together, especially in colder months when coats are thicker and animals have more direct contact. Even when a case looks mild at first, ongoing irritation can affect comfort, skin health, and productivity. Early veterinary guidance helps protect both the affected cow and the rest of the herd.

Mange is caused by infestation with skin mites, not by poor hygiene alone. The exact cause depends on the mite involved. Sarcoptes scabiei var bovis causes sarcoptic mange, Psoroptes ovis causes psoroptic mange, Chorioptes species cause chorioptic mange, and Demodex bovis causes demodectic mange. These mites spread most easily through direct contact between cattle, but some can also move through contaminated equipment, grooming tools, or housing surfaces.

Crowding, winter housing, stress, and poor body condition can make outbreaks easier to sustain. Thick hair coats and close confinement increase contact time between animals. In some herds, mild cases go unnoticed until several animals are rubbing, losing hair, or developing crusted lesions.

Not every mite causes the same level of disease. Chorioptic mange is often mild or even subclinical, while sarcoptic mange is highly contagious and usually much itchier. Demodectic mange may be less itchy but can become chronic and lead to nodules, abscesses, and secondary bacterial infection. Because treatment and control depend on the mite species, your vet will want to identify the likely cause before building a herd plan.

Your vet diagnoses mange by combining the skin lesion pattern, the level of itching, herd history, and microscopic testing. The most common test is a skin scraping. Deep skin scrapings are used when burrowing mites such as Sarcoptes or Demodex are suspected, while superficial scrapings are more useful for surface mites such as Psoroptes and Chorioptes.

In some cases, your vet may collect samples from more than one site because mites are not always easy to find. For demodectic mange, squeezing the skin before scraping can improve recovery of mites from hair follicles. If scrapings are negative but suspicion remains high, your vet may recommend a skin biopsy or may assess response to treatment as part of the diagnostic plan.

Diagnosis also includes ruling out other causes of itching and hair loss, such as lice, ringworm, allergic skin disease, photosensitization, or bacterial skin infection. In food-producing animals, your vet also has to consider the cow's age, pregnancy or lactation status, and meat or milk withdrawal requirements before choosing a treatment option.

Prevention starts with reducing mite spread between animals. Quarantine and closely inspect new arrivals before mixing them into the herd, especially during fall and winter when mange tends to show up more clearly. If a purchased animal is rubbing, losing hair, or has crusted skin, involve your vet before introduction.

Good herd management also matters. Avoid overcrowding when possible, keep bedding and housing reasonably clean and dry, and reduce sharing of contaminated grooming or restraint equipment between groups without cleaning. Cattle that are stressed, thin, or dealing with other disease may be more likely to show heavier infestations.

Work with your vet on a herd-specific parasite control plan rather than treating blindly. The best prevention program depends on whether your cattle are beef or dairy, housed or pastured, and whether there are known problems with lice, mange, or other skin disease on the farm. Early recognition and prompt treatment of the first affected animals can prevent a small problem from becoming a herd-wide outbreak.