Pink eye in cattle

Pink Eye in Cattle: Signs, Prevention and Management

Pink eye is a common and painful eye condition affecting cattle of all ages. While it can sometimes appear relatively minor in the early stages, untreated cases can progress quickly and may lead to reduced performance, permanent eye damage or even loss of sight.

Early identification and good management are therefore an important part of maintaining cattle health and welfare.

What Is Pink Eye?

Pink eye, also known as infectious bovine keratoconjunctivitis (IBK), is an infectious eye disease in cattle.

It causes inflammation of the eye and surrounding tissues and can spread rapidly through a group, particularly when environmental conditions favour transmission.

Several factors can contribute to outbreaks, including bacteria, flies, dust, long grass and irritation or damage to the surface of the eye.

What Are the Signs of Pink Eye?

Regularly observing cattle is one of the best ways to detect pink eye early.

Some of the first signs you may notice include:

• Excessive tearing or watery eyes
• Squinting or keeping an eye partially closed
• Sensitivity to sunlight
• Redness around the eye
• Swelling
• Eye discharge
• A cloudy or white area developing on the surface of the eye
• Cattle seeking shade or avoiding bright areas

As the condition progresses, an ulcer can develop on the cornea. More severe cases can result in significant damage to the eye.

The earlier an affected animal is identified, the sooner appropriate treatment and management can begin.

Why Does Pink Eye Spread?

Pink eye can spread between cattle, particularly when flies are active.

Flies can move between animals and contribute to the transfer of infectious material from an affected eye to other cattle.

Dust, wind, dry conditions and long or rough pasture can also irritate the eye. Once the surface of the eye becomes irritated or damaged, it can become more vulnerable to infection.

UV exposure can also be an important contributing factor, which is one reason pink eye outbreaks are commonly associated with warmer periods of the year.

Prevention Starts With Good Management

While it may not always be possible to completely prevent pink eye, reducing known risk factors can help lower the likelihood and severity of an outbreak.

Consider:

• Maintaining an appropriate fly-control program
• Monitoring cattle closely during high-risk periods
• Managing long, rough or seeding grasses where practical
• Reducing unnecessary dust around cattle
• Providing appropriate shade
• Maintaining good overall herd health and nutrition
• Separating affected animals where appropriate to help reduce transmission

Vaccination may also form part of a farm’s prevention strategy. Talk with your veterinarian about whether vaccination is appropriate for your herd and local conditions.

Early Detection Is Important

Don’t wait until an animal has an obviously white or severely damaged eye before taking action.

A watery eye or animal that suddenly begins squinting may be one of the earliest indications that something is wrong.

Checking cattle regularly allows affected animals to be identified earlier and can help reduce both animal discomfort and the potential spread of disease throughout the group.

Treating Pink Eye

Treatment will depend on the individual animal, severity of the condition and circumstances of the outbreak.

If you suspect pink eye, speak with your veterinarian about an appropriate treatment protocol. Antibiotic treatment may be recommended in some cases, and severely affected eyes may require additional veterinary care.

Always use veterinary medicines according to the label or veterinary directions and observe relevant withholding periods.

It is also important to remember that not every eye problem is pink eye. Foreign bodies, grass seeds, injuries and other conditions can produce similar symptoms, so veterinary advice is particularly important when the cause is uncertain or an eye is severely affected.

Don’t Forget the Environment

Treating affected cattle is only part of managing an outbreak.

Look at what may be contributing to the problem.

Are flies particularly bad? Are cattle grazing rough, seeding pasture? Is the yard extremely dusty? Are new animals showing symptoms?

Addressing these contributing factors can help reduce continued transmission and prevent additional cases.

Healthy Eyes Start With Early Action

Pink eye can have significant animal welfare and production consequences, but careful observation and early action can make a big difference.

Make checking eyes part of your normal livestock routine, particularly during periods when flies, dust and environmental irritation are high.

At KMJ Livestock Solutions, we’re passionate about practical livestock health and management information that helps producers identify problems early and give their animals the best possible care.

Know your cattle. Notice the changes. Act early.

This information is general in nature and is not a substitute for veterinary advice. Contact your veterinarian for diagnosis and treatment recommendations for your livestock.