My stray female dog's nipples are black. Could it be mastitis?

Yes, I would take Lulu into the vet just to be safe. The color of her teats could be due to so many puppies nursing, but mastitis can occur in nursing dogs, which is fatal without treatment. Because of this, it's always important to have any concerns with the teats checked out by a vet to sure everything is ok. I would make an appointment for her on Monday. I hope this helps!

Mya could have mastitis, that would cause her mammary glands to be hot to the touch and hard. Mastitis is fatal without treatment, so she needs to see a vet now. Please take her into an ER vet clinic; if there isn't one in your area, there will be a vet on call for emergencies. The information to reach that vet is found on a clinic's answering machine or website.

It could be that Nova is suffering from mastitis, which is an infection of the mammary glands. This would be painful to her and would cause her to be lethargic. Unfortunately there are no OTC pain medications you can give her, as many human ones are toxic to dogs and can be fatal if given. She needs to see a vet immediately. Mastitis is fatal without treatment, and if she is in a lot of pain, she needs veterinary care right away. Please take her into an ER vet clinic; if there isn't one in your area, there will be a vet on call for emergencies. The information to reach that vet is found on a clinic's answering machine or website. Good luck, I hope this helps!

No spaying won't cure the mastitis. Mastitis is an infection of the mammary glands, and it can be fatal without treatment. You are so lovely for feeding these puppies, and I hope you find them homes. You need to see if there is a vet who will treat her mastitis now. See if the rescue group can help you find a vet. Best of luck.

Mastitis happens when a dog is nursing puppies, so I don't think it is that. It could be an infection, and as long as Sadie is eating, drinking, and otherwise acting normally, it's fine to wait until the morning to see a vet.

Do not allow the puppies to suckle on the dog that is not their mother. She is getting mastitis (infection in the mammary glands). You need to keep them separated. You can try home treatment for the mastitis with cabbage leaves (see link below) but she may need to see a vet for systemic antibiotics. ( https://vcahospitals.com/know-your-pet/mastitis-in-dogs )

This looks like mastitis which is a breast infection. Please take her in right away for treatment as this can become a very serious and painful problem. They will give her antibiotics and may need to do additional medications to reduce the swelling and inflammation. This can become life threatening is not treated quickly. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for Chance.