Milking a goat with mastitis requires a careful approach that protects the doe, prevents the infection from spreading to healthy animals, and keeps you safe. The core principle is simple: you need to empty the infected udder frequently and gently, keep everything sanitary, and discard the milk. Here’s how to do it right.
Recognizing What You’re Dealing With
Before you adjust your milking routine, confirm which form of mastitis your goat has. Clinical mastitis produces obvious signs: the milk contains clots, flakes, or watery streaks, or looks discolored. The affected side of the udder may be swollen, hot, hard, or red. In severe cases the doe will run a fever, stop eating, or become lethargic.
Subclinical mastitis is sneakier. The udder looks normal at a glance, but the milk may contain tiny clumps or flakes you’d miss without close inspection. This is the more common form, and it often goes unnoticed until it progresses into full clinical mastitis. A California Mastitis Test (CMT) kit, available at most farm supply stores, can help you catch it. You mix equal parts milk and CMT reagent on a paddle and watch for thickening. A score of 1 (distinct clumps forming in the mixture) corresponds to roughly 400,000 to 1.5 million somatic cells per milliliter, indicating infection. A score of 2 or 3, where the mixture forms a thick gel or an egg-like mass that won’t break when poured, means the cell count is in the millions and the infection is significant.
How to Milk the Infected Udder
The goal of milking a mastitic goat is to flush bacteria and inflammatory debris out of the udder. This is called stripping, and it should be done by hand rather than with a machine. Machine milking can be too aggressive on inflamed tissue and harder to sanitize between animals.
Start by washing your hands thoroughly and putting on disposable gloves. Clean the udder and teats with a warm, damp cloth or a teat-safe disinfectant wipe. This serves double duty: it removes surface bacteria that could travel into the teat canal, and the warmth helps relax the tissue and encourage milk let-down in an udder that’s sore and tight. If the udder is especially swollen and hard, hold a warm, wet cloth against it for a few minutes before you begin milking.
Strip the first few squirts from each teat into a strip cup (a small cup with a dark screen or filter on top). This lets you visually inspect the milk for clots, flakes, or discoloration. It also removes the milk closest to the teat opening, which carries the highest bacterial load. On the infected side, you’ll likely see abnormal milk immediately. Strip the entire affected half thoroughly, using a gentle but firm downward motion. Work the teat from top to bottom, wrapping your thumb and forefinger around the base of the teat first to trap the milk, then closing your remaining fingers in sequence to push it out. Be deliberate and consistent. Avoid squeezing the udder tissue itself, which is already inflamed and painful.
Direct all milk from the infected side into a dedicated container, never into your regular milk pail. Be careful not to splash mastitic milk onto the floor of your milking area, your clothes, or the doe’s other teat. Bacteria in that milk can easily spread.
How Often to Milk
Veterinarians typically recommend stripping the infected half three times a day rather than the normal twice. The idea is to keep flushing bacteria and toxins out. A dairy research study that compared milking four times a day versus twice a day during antibiotic treatment found no additional benefit from the higher frequency. So three times daily, roughly every eight hours, is a practical target. More than that doesn’t appear to speed recovery and adds stress to an already uncomfortable animal.
Continue this increased frequency for as long as the milk looks abnormal or your veterinarian advises treatment. Once the milk runs clean and any swelling has resolved, you can return to your normal twice-daily schedule.
Hygiene to Prevent Spreading the Infection
Mastitis-causing bacteria, including Staphylococcus, Streptococcus, E. coli, and others, transfer easily between goats on your hands, on shared equipment, or through contaminated bedding. If you have multiple does in milk, always milk the infected goat last. This is the single most important step you can take to protect the rest of your herd.
Use a separate set of cloths, strip cup, and bucket for the sick doe. After each milking, wash all equipment with hot water and a dairy-approved sanitizer, then allow it to air dry. Wash your hands and change gloves between the healthy goats and the infected one. After milking, dip the infected doe’s teats in a teat disinfectant just as you would for any goat. This seals the teat canal while it’s still open and vulnerable to new bacteria entering.
Keep the doe’s bedding clean and dry. Bacteria thrive in damp, soiled bedding, and the teat canal stays slightly dilated for about 30 minutes after milking, creating a window for reinfection.
What to Do With the Milk
Milk from a goat with mastitis is not safe for human consumption. It can harbor bacteria like Staphylococcus, Salmonella, Listeria, Campylobacter, and E. coli, along with biological toxins these organisms produce. If the doe is also being treated with antibiotics, the milk will contain drug residues that pose their own risks, including allergic reactions and contributing to antibiotic resistance.
Discard all milk from the infected side. If only one half of the udder is affected and the other side tests clean on a CMT, some goat keepers will save the milk from the healthy side, but this carries risk. Many veterinarians recommend discarding milk from both sides during active infection and treatment to be safe.
If the doe has nursing kids, don’t let them nurse from the infected side. Severe mastitis cases can spread the infection to kids, and the bacteria and toxins in mastitic milk can make them seriously ill. You can bottle-feed kids with milk from a healthy doe or use a commercial milk replacer until the infection clears. If you must use milk from the affected doe’s healthy side for kids, pasteurizing it first (heating to 161°F/72°C for 15 seconds) reduces the bacterial risk.
Antibiotic Treatment and Withdrawal Times
Milking alone won’t cure most cases of mastitis. Your veterinarian will likely prescribe an antibiotic infused directly into the teat canal. This is done after milking, when the udder is empty, so the medication can contact as much tissue as possible. The stripping you do at each session helps clear infected milk and makes room for the antibiotic to work.
Withdrawal periods (the time after the last antibiotic dose before milk is safe again) vary by product but generally fall in the range of 48 to 122 hours, depending on the specific medication. Your veterinarian will tell you the exact timeline. Don’t use the milk for humans, kids, or other animals until that window has fully passed, even if the milk looks normal again.
Supportive Care Between Milkings
Between milking sessions, warm compresses can ease the doe’s discomfort and help soften a hard, swollen udder before the next stripping. Soak a clean towel in warm (not hot) water, wring it out, and hold it against the affected side for five to ten minutes. This improves blood flow to the area and can make the next milking less painful for the goat and more productive for you.
Make sure the doe has easy access to fresh water and quality feed. Mastitis takes a toll on her energy and body condition, and she needs the calories and hydration to fight the infection. Monitor her temperature and behavior daily. If she develops a fever over 104°F, stops eating entirely, or the udder tissue turns dark or cold (signs of gangrenous mastitis), that’s an emergency requiring immediate veterinary attention.