Dog Mastitis in Breeding Bitches: Welfare Prevention and Management

Mastitis in lactating dogs causes acute pain and systemic illness, threatening the welfare of the mother and the survival of her litter — prevention and early intervention are essential.

Key Facts

Mastitis occurs most commonly in the first two weeks post-whelping when milk production peaks and puppies feed most intensively
Bacterial infection — typically Staphylococcus, Streptococcus, or E. coli — enters through teat damage from nursing puppies
Galactostasis (milk accumulation without infection) and true mastitis require different management approaches
Severe mastitis can progress to septicaemia and is life-threatening without prompt antibiotic therapy
Affected mammary glands may need to be excluded from nursing, requiring supplemental puppy feeding

Welfare Considerations

Mastitis welfare management requires early identification before severe infection develops. Daily monitoring of mammary glands during lactation — checking for heat, pain, colour change, and milk appearance — allows intervention at galactostasis stage before bacterial colonisation occurs. Breeders managing large litters should monitor teat trauma from nursing puppies and rotate litter access to prevent prolonged individual teat use. Early veterinary intervention with culture-guided antibiotics and warm compresses prevents the severe pain and systemic illness of untreated mastitis.

What You Can Do

Inspect all mammary glands daily in lactating bitches during the first three weeks of nursing
Seek veterinary assessment within 24 hours of any reddening, heat, or painful swelling in a mammary gland
Rotate puppy access to teats in large litters to prevent individual teat trauma