Pet Health

What Is Mastitis In Dogs?

Discover what mastitis in dogs is, its symptoms, causes, and treatment options. Learn how to keep your furry friend healthy and happy with our expert tips!
Author: Veterinary Team
Dial A Vet
Updated
June 6, 2025
|
Published
June 6, 2025
Healthy dog nursing puppies, highlighting signs of mastitis in nursing dogs and the importance of veterinary care.

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If your dog has recently given birth or is nursing puppies, you may notice some unusual changes in her behavior or physical health. One common concern for nursing dogs is mastitis—a painful condition that can leave both you and your dog feeling stressed. Understanding what mastitis is, how to spot it, and what you can do is essential for keeping your dog comfortable and healthy.

⚠️ What to Watch For

Mastitis is an inflammation of the mammary glands, often caused by a bacterial infection. It can happen to dogs that are nursing puppies, but it can also occur in non-lactating females. Knowing the signs is key to catching the condition early before it worsens.

Signs of mastitis in dogs may include:

  • Swollen, firm, or red mammary glands
  • Warm or hot areas around the teats
  • Discharge from the nipples (may appear yellow, green, or bloody)
  • Reluctance to let puppies nurse
  • Decreased appetite or lethargy
  • Fever or signs of pain

If you notice any of these symptoms, it’s important to act quickly to prevent complications such as an abscess or systemic infection.

🔍 Possible Causes

Mastitis can develop for several reasons, and understanding the underlying cause can help guide treatment and prevention strategies.

Common causes of mastitis in dogs include:

  • Bacterial infections that enter through cracks or sores on the nipples
  • Milk accumulation due to puppies not nursing evenly or often enough
  • Trauma to the mammary glands, such as bites or scratches from puppies
  • Weaning puppies too abruptly, leading to engorgement

In some cases, mastitis can occur without an obvious reason, so always monitor your dog closely during and after nursing periods.

✅ What You Can Do at Home

If your dog shows mild symptoms of mastitis, there are steps you can take at home to help her feel better. However, these measures should never replace professional veterinary care for moderate to severe cases.

Home care tips for mastitis include:

  • Applying a warm compress to the affected mammary glands to reduce swelling and promote milk flow
  • Encouraging puppies to nurse from all teats evenly to prevent milk buildup
  • Gently massaging the inflamed area to help relieve discomfort
  • Ensuring your dog stays hydrated and well-fed to support her recovery

Always handle the affected area gently, as mastitis can be very painful for your dog. If symptoms persist or worsen, seek veterinary care promptly.

💡 When to Call a Vet

While mild cases of mastitis may improve with home care, more severe cases require prompt veterinary attention. Left untreated, mastitis can lead to serious complications like abscesses or systemic infections that can threaten your dog’s health.

Contact your vet immediately if you notice:

  • Pus, blood, or foul-smelling discharge from the nipples
  • High fever or signs of systemic illness (e.g., vomiting, lethargy)
  • A hard, painful lump that doesn’t improve with home care
  • Puppies refusing to nurse or showing signs of poor health

Your veterinarian may prescribe antibiotics, pain relief, or other treatments to resolve the infection and prevent further issues. In severe cases, surgical intervention may be necessary to drain abscesses or remove damaged tissue.

FAQs

Q: Can mastitis in dogs resolve on its own?
A: Mild cases of mastitis may improve with careful home care, but it’s always best to consult your vet to ensure proper treatment and avoid complications.

Q: Is mastitis contagious to puppies?
A: While the infection itself isn’t contagious, bacteria from the affected mammary glands can pose a risk to nursing puppies. Puppies should be monitored closely for signs of illness.

Q: How can I prevent mastitis in my dog?
A: Prevent mastitis by keeping your dog’s mammary glands clean, ensuring puppies nurse evenly, and addressing any injuries or milk buildup promptly.

Book a $49 online vet consultation at https://www.dialavet.com for fast, expert advice.

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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