Mange in Cows: Mite Infection Symptoms, Treatment, and Prevention

Mange is a skin disease caused by tiny parasitic mites. In cattle, the main mite groups include Sarcoptes, Psoroptes, Chorioptes, and Demodex. These mites either burrow into the skin or live on the skin surface, leading to irritation, hair loss, crusting, and sometimes secondary skin infection.

Not every type of mange looks the same. Chorioptic mange is the most common form reported in US cattle and often affects the pasterns and lower legs, sometimes spreading to the udder, scrotum, tail, and perineum. Sarcoptic mange usually starts on the head, neck, and shoulders and can spread widely. Psoroptic mange often affects the back, flank, and tail base and tends to be very itchy. Demodectic mange is often less itchy but can cause nodules and damage to hides.

Many cases become more noticeable in colder months, when cattle are housed closer together and have longer hair coats. Even when the disease is not life-threatening, it can still affect comfort, weight gain, milk production, hide quality, and herd health management.

Because several skin problems can mimic mange, your vet is the best person to confirm the cause and help you choose a treatment plan that fits the animal, the herd, and the production system.

Mange is caused by infestation with parasitic mites, usually spread by direct contact between cattle. Some mites can also spread on equipment, tack, grooming tools, fencing, or other contaminated items. Crowding, close winter housing, and introducing untreated animals can all make herd spread more likely.

The exact signs depend on the mite involved. Sarcoptes scabiei var. bovis is a burrowing mite and is highly contagious. Psoroptes ovis lives on the skin surface and causes intense irritation and crusting. Chorioptes bovis commonly affects the lower legs and is often milder, though it can still cause discomfort and herd-level problems. Demodex bovis lives in hair follicles and may cause nodules and chronic skin inflammation, especially in younger cattle.

Risk tends to rise when cattle are stressed, thin, housed closely, or carrying heavy hair coats in late fall and winter. Poor biosecurity also matters. Bringing in new animals without quarantine or herd screening is a common way mites move onto a farm.

Mange is not caused by poor care alone. It is a contagious parasite problem that can affect well-managed herds too. That said, housing, stocking density, nutrition, and parasite-control planning all influence how severe an outbreak becomes.

Your vet usually starts with a hands-on skin exam and a close look at where the lesions are located. The pattern matters. For example, sarcoptic mange often starts on the head, neck, and shoulders, while chorioptic mange commonly affects the pasterns and lower legs. Psoroptic mange often shows up over the back, flank, and tail base.

To confirm the diagnosis, your vet may collect skin scrapings and examine them under a microscope. The type of scraping can differ by mite. Burrowing mites like Sarcoptes often require deep skin scrapings, while surface mites such as Psoroptes and Chorioptes are often found on superficial scrapings. In some cases, your vet may also recommend skin biopsy or make a diagnosis based on history, exam findings, and response to treatment.

Your vet may also rule out other causes of hair loss and itching, such as lice, ringworm, photosensitization, allergic skin disease, bacterial skin infection, or nutritional issues. That step matters because these conditions can look similar at first glance.

If one cow is affected, your vet may still think at the herd level. Mange often spreads before every animal shows obvious signs, so diagnosis may include checking pen mates, recent additions, and housing conditions.

Prevention starts with biosecurity. Quarantine incoming cattle, watch closely for itching or skin lesions, and ask your vet whether preventive treatment or screening makes sense before mixing them with the herd. Mange often enters a farm through apparently healthy animals carrying mites at low levels.

Good herd management also helps. Reduce overcrowding when possible, keep handling equipment and grooming tools clean, and pay extra attention during late fall and winter, when mange signs often become more obvious. If one group has confirmed mange, your vet may recommend treating exposed pen mates rather than waiting for every animal to show lesions.

Work with your vet on a parasite-control plan that fits your production system. Product choice matters because labels, withdrawal times, and approvals differ for beef cattle, dairy cattle, calves, and breeding animals. Using the wrong product or wrong timing can leave mites behind and make outbreaks harder to control.

Finally, keep records. Note when signs started, which groups were affected, what treatment was used, and when cattle improved. That information helps your vet spot seasonal patterns and build a more effective prevention plan for future years.