Pet Health

Mastitis in Dogs

Learn about mastitis in dogs, including causes, symptoms, treatment, and prevention tips to keep your furry friend healthy and happy.
Author: Veterinary Team
Dial A Vet
Updated
June 6, 2025
|
Published
June 6, 2025
Dog exhibiting signs of mastitis, with swollen mammary glands and discomfort, highlighting the condition's impact on canine health.

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Mastitis in dogs can be a distressing condition for both pets and their owners. If your dog has recently given birth or is nursing puppies, you might notice changes in her behavior or physical health that raise concern. Understanding mastitis, its symptoms, causes, and treatment options can help you provide the best care for your furry friend.

⚠️ What to Watch For

Mastitis is an infection of the mammary glands, typically occurring in lactating dogs. Knowing the signs can help you spot the condition early and get your dog the care she needs. Here are the common symptoms to watch for:

  • Swollen or firm mammary glands
  • Redness, warmth, or discoloration of the skin
  • Discomfort or pain when touched
  • Discharge from the nipples, which may be green, yellow, or bloody
  • Lethargy or reduced energy levels
  • Loss of appetite
  • Fever or elevated body temperature
  • Reluctance to nurse puppies

Severe cases of mastitis can lead to abscesses or systemic infections, which require immediate veterinary attention. If you notice any of these symptoms, do not delay in seeking help for your dog.

🔍 Possible Causes

Mastitis is usually caused by bacterial infections entering the mammary glands through the nipples. This can happen due to:

  • Injuries or scratches to the nipples from nursing puppies
  • Unsanitary conditions where bacteria thrive
  • Blocked milk ducts, leading to milk accumulation and inflammation

In some cases, mastitis can also occur in non-lactating females due to hormonal imbalances or trauma to the mammary glands. Preventive care and hygiene play a crucial role in reducing the risk of mastitis.

✅ What You Can Do at Home

If your dog shows mild signs of mastitis, there are a few things you can do to provide relief while waiting for veterinary care:

  • Apply warm compresses to the affected area to reduce swelling and improve circulation.
  • Ensure the puppies are nursing evenly from all teats to avoid milk buildup.
  • Keep the environment clean to minimize exposure to bacteria.
  • Encourage your dog to drink plenty of water to stay hydrated.

While these steps can provide temporary relief, it’s essential to consult a veterinarian for proper diagnosis and treatment. Mastitis often requires antibiotics or other medications to resolve the infection fully.

💡 When to Call a Vet

Mastitis can escalate quickly, so it’s important to know when to seek professional help. Contact your veterinarian immediately if you notice:

  • Severe pain or distress in your dog
  • Abscesses or open sores on the mammary glands
  • Puppies refusing to nurse or not gaining weight
  • Signs of systemic illness like fever, vomiting, or lethargy

In some cases, your vet may recommend stopping nursing temporarily to allow the affected gland to heal. If this happens, you may need to bottle-feed the puppies with a veterinarian-approved milk replacer.

FAQs

Q: Can mastitis go away on its own?
A: Mild cases of mastitis may improve with supportive care, but most cases require veterinary treatment, especially if an infection is present.

Q: How can I prevent mastitis in my dog?
A: Keep your dog’s living area clean, monitor her nipples for any injuries or swelling, and ensure puppies nurse evenly. Regular veterinary check-ups during pregnancy and lactation can also help catch issues early.

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References

While every effort is made to ensure the accuracy of this content - including vet review where applicable - this article is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is unwell or you are concerned, please speak with a licensed veterinarian. You can book a $49 online consultation with our veterinary team  😄
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