Otitis Media and Interna in Cows: Ear Infection Causing Head Tilt and Facial Paralysis
- Otitis media affects the middle ear, and otitis interna affects the inner ear. In cows and calves, these infections can cause head tilt, ear droop, facial paralysis, balance problems, and reduced nursing or appetite.
- Young calves are affected most often. Bacteria linked with bovine ear infections include Mycoplasma bovis, Mannheimia haemolytica, Pasteurella multocida, and Histophilus somni.
- This is not a wait-and-see problem when neurologic signs are present. Early treatment gives the best chance for improvement, while delayed care can lead to permanent nerve damage or spread of infection.
- Your vet may recommend a physical and neurologic exam, ear evaluation, and sometimes imaging or sampling to look for pneumonia, septicemia, or other related disease.
- Typical 2025-2026 U.S. cost range for farm-based evaluation and treatment is about $250-$900 for straightforward cases, with referral imaging, hospitalization, or advanced care sometimes reaching $1,500-$3,500+.
What Is Otitis Media and Interna in Cows?
Otitis media is inflammation or infection of the middle ear, while otitis interna involves the inner ear. In cows, especially calves, these infections can affect nearby nerves and balance structures. That is why an ear infection in a calf may look like a neurologic problem, with signs such as a head tilt, drooping ear, facial asymmetry, or trouble standing normally.
The facial nerve runs very close to the middle ear. When inflammation spreads in that area, cows may develop facial nerve palsy. Pet parents and producers may notice a dropped ear, droopy eyelid, lip droop, reduced blink, or tearing on one side. If the inner ear is involved, vestibular signs such as leaning, circling, nystagmus, or loss of balance can appear.
In cattle, otitis media and interna are seen most often in young calves, though older animals can be affected too. Cases may occur on their own or alongside respiratory disease, septic arthritis, or other signs of systemic infection. Because these infections can worsen and sometimes extend deeper, prompt evaluation by your vet matters.
Symptoms of Otitis Media and Interna in Cows
- Head tilt to one side
- Drooping ear
- Facial paralysis or facial asymmetry
- Tearing or dry eye on the affected side
- Balance problems, stumbling, leaning, or circling
- Nystagmus or abnormal eye position
- Ear pain, head shaking, or sensitivity near the ear
- Poor nursing, reduced appetite, weight loss, or poor growth
- Fever or signs of pneumonia
- Recumbency, severe weakness, or worsening neurologic signs
When a cow or calf has a head tilt, drooping ear, facial paralysis, or trouble balancing, it is time to call your vet. These signs can come from ear infection, but they can also overlap with other serious conditions such as listeriosis, trauma, meningitis, or brain disease.
See your vet immediately if the animal cannot stand, is not nursing, has rapid worsening of signs, shows eye injury from poor blinking, or also has fever, pneumonia, or severe depression. Early treatment tends to offer a better outlook than delayed care.
What Causes Otitis Media and Interna in Cows?
In cattle, ear infections usually develop when bacteria reach the middle ear through the auditory tube from the throat or upper respiratory tract, or less commonly by extension from the external ear. In calves, this often happens during or after respiratory disease. Important bacterial causes reported in cattle include Mycoplasma bovis, Mannheimia haemolytica, Pasteurella multocida, and Histophilus somni.
Young calves are at higher risk because their immune systems are still developing, and they may also be dealing with stress, transport, crowding, poor ventilation, or inadequate colostrum intake. Concurrent pneumonia is common in affected calves. Some calves with otitis media and interna also have septic arthritis or other evidence of systemic infection.
Management factors matter too. Damp housing, poor air quality, and delayed treatment of respiratory disease can increase risk. In some herds, repeated cases may point to broader calf-health issues rather than an isolated ear problem. Your vet may want to look beyond the ear itself and assess the whole calf, the group, and the environment.
How Is Otitis Media and Interna in Cows Diagnosed?
Your vet usually starts with a history, physical exam, and neurologic exam. The pattern of signs can be very helpful. A head tilt, ear droop, lip droop, poor blink, facial asymmetry, and balance changes on the same side can strongly suggest disease in the middle or inner ear.
Diagnosis in the field is often based on clinical findings, but your vet may also look for related problems such as pneumonia, fever, dehydration, poor growth, or joint swelling. In some cases, ear examination, ultrasound, radiographs, or referral imaging such as CT can help confirm the diagnosis or assess severity. Imaging is especially useful when signs are severe, chronic, or not responding as expected.
Because several serious diseases can mimic ear infection in cattle, your vet may also work through a list of differentials. These can include listeriosis, meningitis, trauma, polioencephalomalacia, and other neurologic disorders. If a calf is very sick, additional testing such as bloodwork, culture, or necropsy in herd-level investigations may help guide treatment and prevention decisions.
Treatment Options for Otitis Media and Interna in Cows
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Budget-Conscious Care
- Farm call and physical plus neurologic exam
- Assessment for concurrent pneumonia or dehydration
- Systemic prescription medication selected by your vet based on likely herd pathogens and drug-label constraints
- Anti-inflammatory medication if appropriate
- Eye lubrication or eye protection if blinking is reduced
- Nursing care, easier access to feed and water, and close recheck monitoring
Recommended Standard Treatment
- Complete farm or clinic evaluation with focused neurologic exam
- Targeted treatment plan for suspected otitis media/interna and any concurrent respiratory disease
- Prescription antimicrobial plan and anti-inflammatory care directed by your vet
- Eye care for facial paralysis and corneal protection
- Basic diagnostics such as bloodwork, herd-history review, and selected imaging or sampling when available
- Scheduled recheck to assess response within days rather than waiting for obvious decline
Advanced / Critical Care
- Referral or hospital-level care
- Advanced imaging such as CT when available
- Hospitalization with fluids, assisted feeding, and intensive nursing support
- Expanded diagnostics for severe, recurrent, or nonresponsive cases
- Management of complications such as corneal ulcers, recumbency, or suspected spread of infection
- Discussion of prognosis, welfare, and herd-level implications if Mycoplasma bovis or systemic disease is suspected
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About Otitis Media and Interna in Cows
Bring these questions to your vet appointment to get the most out of your visit.
- Do my cow's signs fit middle ear disease, inner ear disease, or another neurologic problem?
- What other conditions do we need to rule out, such as listeriosis, meningitis, trauma, or polioencephalomalacia?
- Is there evidence of pneumonia, septicemia, or another infection source that may be linked to the ear problem?
- What treatment options fit this animal's condition and our goals for care?
- What eye care is needed if blinking is reduced or facial paralysis is present?
- How soon should we expect improvement, and what signs mean the plan is not working?
- Would imaging, culture, or referral change treatment decisions in this case?
- Are there herd-level prevention steps we should take for calves with respiratory disease or repeated ear infections?
How to Prevent Otitis Media and Interna in Cows
Prevention focuses on calf health, respiratory disease control, and early intervention. Because many bovine ear infections are linked to upper respiratory disease, good ventilation, dry bedding, reduced crowding, and strong colostrum management are important starting points. Calves that get an excellent start are less likely to struggle with the infections that can later involve the ear.
Prompt treatment of coughing, fever, nasal discharge, poor nursing, or depressed attitude may also reduce the chance that infection spreads to the middle ear. If one or more calves develop ear droop, head tilt, or facial asymmetry, involve your vet early rather than waiting for severe neurologic signs.
For herds with repeated cases, your vet may review housing, milk-feeding practices, grouping, biosecurity, and the role of pathogens such as Mycoplasma bovis. Prevention is often not about one single fix. It is usually a combination of better calf immunity, cleaner air, lower stress, and faster response when illness first appears.