Mastitis in Nursing Mother Cats: A Painful but Treatable Problem

In this guide

Mastitis is not something most cat owners think about until they are hand-raising a litter and notice the mother cat wincing when her kittens latch on. It is an infection of the mammary glands, seen almost exclusively in nursing or recently pregnant queens, and while less common in cats than in dogs, it can turn serious quickly if ignored.

How it develops

A queen typically has four pairs of mammary glands. Infection usually enters through tiny scratches from kittens' claws around the nipple, or from milk that has pooled in a gland that is not being nursed from evenly, letting bacteria take hold. Poor hygiene in the nesting area, particularly relevant during the humid months in India when bedding stays damp longer, adds to the risk.

Signs to watch for

• One or more glands that are swollen, hot, hard, or clearly painful to touch
• Milk that looks discoloured, lumpy, or blood-tinged rather than white
• The queen avoiding or refusing to let kittens nurse from a particular gland
• Fever, lethargy, or loss of appetite in the mother
• Kittens failing to gain weight as expected, or becoming restless and crying more than usual

Treatment

Mild cases, where the gland is only mildly swollen and the mother is otherwise bright, often respond to frequent nursing (which keeps milk moving and prevents stagnation), gentle warm compresses two to three times a day, and close monitoring. Do not massage or forcibly express a painful gland, as this can worsen the inflammation. Never reach for a human painkiller such as paracetamol or ibuprofen for a nursing queen in discomfort; both are toxic to cats, and paracetamol in particular can be fatal even in small amounts. Pain relief should only come from your vet, in a form that is also safe for the nursing kittens.

Once fever or lethargy sets in, this becomes a case for antibiotics chosen to be safe for nursing kittens, along with pain relief dosed carefully for a lactating cat. If an abscess has formed, your vet may need to drain it surgically. In severe or septic cases, kittens may need to be temporarily switched to a kitten milk replacer while the mother recovers, and your vet can guide you on safe formula options and feeding schedules.

Prevention for breeders and foster carers

• Keep the nesting area clean and change bedding regularly, especially in humid weather
• Trim kittens' claws gently from about two weeks of age to reduce scratching
• Check the mother's mammary glands daily during the first few weeks of nursing
• Contact a vet immediately if you notice heat, swelling, or a mother reluctant to nurse from one side

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