What Eyes and Ears Tell You About Cattle Health
A cow's eyes and ears are remarkably sensitive indicators of overall health. A sick animal often shows changes in these areas before other symptoms become apparent. The eyes can reveal systemic illness, nutritional deficiencies, and local infections. Ear position and movement communicate pain, alertness, depression, and neurological status.
Learning to read these indicators helps you spot problems earlier, make faster treatment decisions, and better assess how your herd is doing overall.
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Normal Eye Appearance
Healthy Eye Characteristics
- No cloudiness or opacity
- Smooth, glistening appearance
- Reflects light evenly
- Not red or inflamed
- Moist but not excessively wet
- Visible when you pull down lower lid
- Equal size in both eyes
- Responsive to light changes
- Black, clear appearance
- Not yellow (jaundice)
- Not red (bloodshot)
- May show pink edge at inner corner
- Should retract smoothly
- Not protruding or elevated
Normal Eye Function
| Function | Normal Response |
|---|---|
| Blink reflex | Both eyes blink when startled |
| Light response | Pupils constrict in bright light |
| Tracking | Eyes follow movement |
| Tear production | Moist without overflow |
| Eye position | Centered, not sunken or bulging |
Abnormal Eye Signs and Their Meanings
Discharge and Tearing
- May be early pinkeye
- Could signal dust/pollen irritation
- Check for foreign body
- Classic pinkeye sign
- May see crusting on face
- Treatment usually needed
- Systemic illness possible
- More aggressive treatment needed
- Watch for spread to other animals
- Severe infection
- Cancer eye (squamous cell carcinoma)
- Veterinary evaluation needed
Corneal Changes
|------------|--------------|---------| | Small white spot | Early pinkeye ulcer | Treat within 24 hours | | Central opacity | Active ulcer | Treat immediately | | Blue-white haze | Edema from inflammation | Same-day treatment | | Complete white eye | Severe/chronic damage | Veterinary evaluation |
- Response to chronic irritation
- May indicate healing
- May indicate chronic disease
- Severe pinkeye
- Risk of rupture
- Emergency treatment needed
Pupil Abnormalities
- Brain injury/disease
- Possible rabies sign
- Check for trauma history
- Severe brain issue
- Toxicity possible
- Requires veterinary evaluation
- Congenital defect
- Usually chronic issue
Third Eyelid Elevation
- Severe pain
- Weight loss/poor condition
- Tetanus (classic sign)
- Neurological disease
- Pinkeye involvement
- Foreign body irritation
Sunken Eyes
- Severe illness
- Starvation/chronic weight loss
- Fat loss around eye
- Moderate dehydration: Obviously sunken
- Severe dehydration: Deeply sunken, almost recessed
Bulging Eyes
- Abscess behind eye
- Cancer
- Injury causing swelling
Eye Disease Reference Guide
Pinkeye (Infectious Bovine Keratoconjunctivitis)
- Eye held partially closed
- Light sensitivity (turns away from sun)
- Slight redness of conjunctiva
- More severe tearing/discharge
- Eye may be completely closed
- Animal holding head down
- Yellow/green discharge
- Possible corneal rupture
- May see blood in eye
- Permanent damage occurring
- Face flies present
- Tall grass irritating eyes
- UV light exposure
- Previous pinkeye outbreaks
Cancer Eye (Squamous Cell Carcinoma)
- Usually begins at junction of white and colored eye
- Roughened surface texture
- Slow growing initially
- May bleed or ulcerate
- Can invade eye socket
- Spread possible if advanced
- Hereford and white-faced cattle
- High UV exposure
- Older animals (typically 8+ years)
- Previous precancerous lesions
Vitamin A Deficiency
- Excessive tearing
- Cloudy cornea
- Dry eyes
- May progress to blindness
- Reduced fertility
- Increased respiratory infections
- Calves most affected
Trauma
- May see wound or swelling
- Bleeding possible
- Often one eye only
- Pain evident
- Branch/stick injury
- Trailer accident
- Working facility injury
Normal Ear Appearance and Position
Healthy Ear Characteristics
- No discharge or odor
- No swelling or deformity
- Inner ear pink, not red
- No excessive wax visible
Normal Ear Movement
- Swivel independently to locate sounds
- Flick to remove flies
- Move with head position changes
- Rapid response to startling sounds
Abnormal Ear Signs and Their Meanings
Droopy Ears
- Fever
- Pain
- One of the "sick calf" triad signs
- Watch for other symptoms
- Nerve damage
- Injury
- Abscess
- Botulism
- Listeriosis
- Rabies (especially if asymmetric)
Ear Discharge
- May cause head shaking
- Treatment available
- Needs treatment
- May affect balance if inner ear involved
- Severe infection
- Possible tumor (rare)
- Veterinary evaluation needed
Ear Swelling
- From head shaking or trauma
- Often from ear tag damage
- May need drainage
- Discharge present
- May need tag removal
- Antibiotics often required
- May be hot/painful
- Usually from infection
- May need lancing
Head Tilting
- Vestibular disease
- Abscess affecting ear
- May walk in circles
- Loss of balance
- Difficulty standing
- Rolling when down
Assessment Protocol for Eyes and Ears
Distance Assessment (20+ yards)
- Head position (tilting?)
- Eye openness (both open equally?)
- Ear position (alert, droopy?)
- Any obvious discharge
Closer Assessment (5-10 yards)
- Tearing tracks on face
- Ear discharge visible
- Swelling around eyes or ears
- Eye cloudiness
Close Examination (restrained animal)
- Look for corneal damage/ulcers
- Check pupil response with light
- Assess sunkenness/hydration
- Look for third eyelid elevation
- Look into ear canal if possible
- Note any discharge or odor
- Palpate for heat or pain
Correlating Eye/Ear Signs with Systemic Health
Eyes as Windows to Overall Health
- Severe infection
- Red blood cell destruction
- Requires veterinary evaluation
- Internal parasites
- Blood loss
- Chronic disease
- Toxicity
- Local inflammation
Ear Position as Health Indicator
- Fever likely
- Check other vital signs
- Examine closely
- May affect balance
- Needs treatment
- Consider polioencephalomalacia
- Rabies differential (rare)
- Veterinary emergency
Decision Guide for Eye Problems
Treat Within 24 Hours
- Clear discharge with slight eye closure
- Early white spot on cornea (small, peripheral)
- Single animal affected
- Animal still eating
Treat Immediately
- Significant corneal cloudiness
- Yellow/green discharge
- Eye completely closed
- Multiple animals affected
- Animal off feed
Veterinary Consultation
- Eye rupture suspected
- No response to initial treatment
- Cancer eye suspected
- Sudden blindness
- Bilateral severe involvement
Emergency
- Eye prolapse (eye coming out)
- Severe trauma
- Signs of neurological involvement
- Rapid spread through herd
Decision Guide for Ear Problems
Monitor
- Mild wax buildup
- Single ear tag irritation
- Head shaking without other signs
Treat Soon
- Discharge from ear
- Swelling at tag site
- Head shaking with discharge
- Both ears consistently droopy
Veterinary Consultation
- Head tilt
- Loss of balance
- Circling behavior
- Severe ear infection not responding
Environmental and Management Factors
Eye Health Risks
- Tall grass seed heads
- Dusty feedlot conditions
- Strong UV exposure
- Poor nutrition (Vitamin A)
- Pasture management
- Shade provision
- Proper mineral supplementation
- Early pinkeye treatment
Ear Health Risks
- Fly strike
- Cold weather ear tips (frostbite)
- Fighting among cattle
- Fly control
- Shelter in severe cold
- Dehorning to reduce fighting injuries
FAMACHA Eye Scoring for Parasite Load
The FAMACHA System
Originally developed for sheep/goats but principle applies:
- Compare to color chart
- Score 1-5 based on pinkness
| Score | Color | Meaning |
|---|---|---|
| 1 | Red/dark pink | Healthy, good blood count |
| 2 | Pink | Acceptable |
| 3 | Light pink | Borderline, monitor |
| 4 | Pale pink/white | Anemic, treat for parasites |
| 5 | White | Severely anemic, emergency |
Seasonal Considerations
Summer
- Face flies most active
- UV damage highest
- Dust from dry conditions
- Ear tag irritation from sweat
Winter
- Less pinkeye risk
- Frozen eye injuries rare but possible
- Ear mites may increase indoors
Spring/Fall
- Early/late pinkeye season
- Calving-related injuries
- Processing stress effects
Frequently Asked Questions
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Bottom Line
- Check eyes daily - Early pinkeye detection prevents blindness
- Note ear position - Droopy ears are often the first sign of illness
- Compare left to right - Asymmetry indicates localized problems
- Know normal for your cattle - Individual variation exists
- Act on discharge - Eye or ear discharge needs attention
Related Articles
- Pinkeye: Causes, Prevention, Treatment
- Daily Herd Observation Protocol
- Recognizing Sick Cattle at a Distance
- Body Condition Scoring Guide
References
- Angelos, J.A. (2015). Infectious bovine keratoconjunctivitis (pinkeye). Veterinary Clinics of North America: Food Animal Practice, 31(1), 61-79.
- Texas A&M AgriLife Extension. (2024). Pinkeye in Cattle: Prevention and Treatment. Publication E-497.
- Brown, M.H., et al. (1998). Infectious bovine keratoconjunctivitis: A review. Journal of Veterinary Internal Medicine, 12(4), 259-266.
- Beef Quality Assurance. (2024). Cattle Health Assessment Guidelines.
- University of Nebraska-Lincoln. (2023). Eye Cancer in Cattle. NebGuide G2032.
- Grandin, T. (2015). Improving Animal Welfare: A Practical Approach. CABI Publishing.
Article published by AnimalSafeRanch.com | Last updated: January 2026 Reviewed by: Licensed veterinarians and beef cattle specialists
