CATTLE AND SHEEP AND GOATS AND CAMELIDS AND PIGS · OWNER EDUCATION
Mastitis in Dairy and Nursing Animals
Mammary-gland inflammation may alter milk and cause pain, reduced production or severe whole-body illness.
THE SHORT VERSION
Understanding supports better veterinary conversations.
Mammary-gland inflammation may alter milk and cause pain, reduced production or severe whole-body illness. Similar signs can have very different causes, so the animal's species, husbandry, examination findings and diagnostic results all matter.
What is this condition?
Mammary-gland inflammation may alter milk and cause pain, reduced production or severe whole-body illness. Similar signs can have very different causes, so the animal's species, husbandry, examination findings and diagnostic results all matter.
Which animals can be affected?
Risk factors, examination findings and management can differ between species and individual patients.
Why can it happen?
- Bacterial infection entering through the teat or associated with injury and hygiene.
- Environmental and contagious organisms require different control plans.
What might an owner notice?
- Hot, swollen or painful gland and abnormal milk.
- Reduced production, fever, poor appetite or a hungry young animal.
How is the problem investigated?
- Milk examination, culture and sensitivity when appropriate.
- Assessment of the dam, young and herd pattern.
What might treatment involve?
- Veterinarian-selected medication, pain relief and supportive care.
- Milk-withdrawal compliance and management of nursing young.
This is an overview, not a prescription or a recommendation for a specific individual animal.
What can owners do at home?
- Record appetite, water intake, waste output, activity, breathing and body weight when it is safe to do so.
- Photograph the enclosure, food labels or flock environment and bring a concise timeline to the veterinary visit.
- Follow the veterinarian's exact instructions for medication, feeding, isolation, rechecks and environmental correction.
Avoid actions that could make care less safe.
- Do not give human medication, leftover antibiotics, livestock medication or another animal's treatment without veterinary direction.
- Do not force-feed an animal that is struggling to breathe, cannot swallow, is severely weak or may have an obstruction.
- Do not delay care when appetite, breathing, urination, movement or responsiveness changes rapidly.
What can the longer-term outlook involve?
The outlook varies with the cause, severity, how quickly care begins and whether the animal's environment or nutrition can be corrected.
Can risk be reduced?
- Provide species-appropriate nutrition, housing, sanitation and preventive veterinary care.
- Learn the individual's normal appetite, behavior, body condition and waste pattern so change is recognized early.
When should you arrange care?
- Contact a veterinarian promptly for hot, swollen or painful gland and abnormal milk. or reduced production, fever, poor appetite or a hungry young animal..
- Arrange reassessment if signs recur, treatment is not working or another animal becomes affected.
Seek emergency veterinary care if you notice:
SEEK EMERGENCY VETERINARY CARE- Cold or blue gland, severe weakness, dehydration, collapse or toxic appearance.
Sources behind this guide
VeterinaryPartner — client education from the Veterinary Information NetworkPrimary veterinary or veterinary-university guidance ↗Merck Veterinary Manual: livestock healthPrimary veterinary or veterinary-university guidance ↗Content last reviewed: September 17, 2026. Review status: veterinary-informed; independent veterinarian review not yet completed.