Mastitis in Ewes and Goats: Signs, Prevention and Records
Learn to spot mastitis in ewes and goats early, what to do on the day, when to call the vet and how good udder records prevent repeat cases and lost lambs.
Mastitis is an infection and inflammation of the udder, usually caused by bacteria entering through the teat canal. In ewes and goats it shows as a hot, swollen, painful half, abnormal milk (clots, watery, bloody) or a lamb that is hungry and weak. Catch it early, separate the female, call your vet for treatment, and record the case so chronic cases can be culled.
Mastitis is not only a problem for dairy goat farms. In meat flocks it quietly kills profit: lambs and kids from an affected dam grow slowly or starve, the udder may lose a half permanently, and severe forms can kill the female within days. The good news is that most cases are linked to things you can manage: hygiene, bedding, milking routine and weaning practice.
What causes mastitis in sheep and goats
Bacteria are the usual culprits. They come from dirty, wet bedding, from the lamb's or kid's mouth, from the milker's hands or equipment, or from wounds on the teat. Some risk factors are well known to every breeder:
- Wet, dirty pens and bedding, especially around lambing and kidding.
- Teat injuries from rough ground, thorny plants, insect bites or sharp lamb teeth.
- Abrupt weaning or drying-off while the udder is still full.
- Poor milking hygiene: unwashed hands, shared cloths, incomplete milking.
- Uneven suckling, for example a single lamb that suckles only one side.
- Older females and those with a history of mastitis, which are more likely to have it again.
- Low body condition and nutrition gaps that weaken the female's defences.
There are two broad forms. Clinical mastitis is visible: the udder or milk looks abnormal. Subclinical mastitis shows no obvious signs but reduces milk yield and quality, and is only detected by tests such as the California Mastitis Test (CMT) or lab analysis.
Signs to check every day
During lactation, a quick look at udders should be part of the daily round. Watch for:
| What you see | What it may mean |
|---|---|
| One half hot, hard, swollen or painful | Acute clinical mastitis |
| Clots, flakes, watery or bloody milk | Clinical mastitis, even if the udder looks normal |
| Cold, blue or black udder skin | Severe (gangrenous) mastitis: an emergency |
| Female refuses to let lambs suckle, kicks | Pain in the udder |
| Hungry, crying, weak lamb or kid | Dam may have mastitis or low milk |
| Hard lumps in the udder after weaning | Old or chronic infection |
| Fever, no appetite, lameness on one hind leg | Female is unwell; the udder is a common cause |
The gangrenous form deserves a special warning. If the skin of the udder turns cold and dark, the female can die quickly. Call the vet immediately.
What to do on the day you find a case
- Separate the female with her young into a clean, dry pen so you can watch her and feed the lambs if needed.
- Call your vet. The choice of treatment, the product and the dose are the vet's decision. Do not use leftover antibiotics from another case.
- Strip out the affected half only if the vet advises it, wearing gloves, and dispose of that milk away from other animals.
- Support the young. Lambs or kids may need bottle feeding or fostering while the dam recovers.
- Respect the withdrawal period your vet gives you for milk and meat. Do not sell or drink milk from a treated female before it ends.
- Record everything: date, which side, signs, treatment, the vet's name and the outcome.
Prevention that actually works
Prevention costs less than treatment and protects the next lambing too.
Keep lambing and kidding areas clean and dry. Fresh bedding, good drainage and enough space are the foundation. Crowded, wet pens are where most outbreaks start.
Milk with a routine. If you milk goats or ewes, wash and dry hands, use a separate clean cloth or paper per animal, milk completely, and milk known infected females last. Your vet may recommend teat dipping after milking.
Manage weaning and drying-off. Reduce concentrate feed for a few days before weaning so milk production drops, and check udders in the days after. See our guide to weaning lambs and kids for a step-by-step approach.
Check teats and udders before mating. A female with a hard, lumpy or blind half will struggle to raise twins. This is the right moment to decide whether she stays in the flock.
Isolate and test new females. Bought-in animals can bring infections with them. A short quarantine for new animals lets you check udders and general health before mixing.
Feed for condition. Ewes and goats in poor body condition before and after giving birth have weaker defences. Balanced rations in late pregnancy and early lactation pay back twice.
Culling chronic cases
Some females keep coming back with mastitis or carry a permanently damaged half. Keeping them is expensive: they raise fewer and lighter young, need more treatment and can be a source of infection for others. Common reasons to cull include:
- Two or more clinical cases in the same female.
- A half that is hard, lumpy or producing no milk.
- A female that repeatedly fails to raise her lambs without help.
To make that decision with confidence you need history, not memory. Which ewe had mastitis last year? Was it the same side? How did her lambs grow?
Keeping udder health records in practice
A simple routine makes mastitis manageable:
- Log each case as an illness on the female's record with date, side and signs.
- Add the treatment the vet gave and set a reminder for re-checks and the end of the withdrawal period.
- Use the isolation status while she is separated, so workers know not to mix her back in.
- Track lamb weights: slow growth in a whole litter often points to the dam.
- Review the list of mastitis cases before each breeding season to pick culls.
In Throf, every female has a health history with illnesses, treatments, inspections and reminders, plus milk records for dairy herds. Workers can log a case from their phone in the pen, and the record follows the animal by her number and colour tag. When you plan the next season, the history is already there.
FAQ
Can lambs drink milk from a ewe with mastitis?
Lambs often refuse the infected half because the milk is changed and painful to draw. Make sure they get enough milk from the healthy side or by bottle, and ask your vet about the specific case.
How do I know if my goats have subclinical mastitis?
There are no visible signs, so you need a test such as the California Mastitis Test on each half, or lab analysis of milk samples. A drop in milk yield with normal-looking milk is a common clue.
Is mastitis contagious between animals?
Some of the bacteria involved can spread through milkers' hands, equipment, bedding and suckling young. Isolating cases, milking them last and keeping pens clean reduces the spread.
Should I cull a ewe after one case of mastitis?
Not always. A ewe that recovers fully with a normal udder can stay. Repeat cases, or a half that remains hard or blind, are the usual reasons to cull.
General guidance only — it does not replace your veterinarian or the competent authority in your country.
