Custom Search
Dog Breed Info Center(R) DBIC
Dog Breed Info Center(R)



Mastitis In Dogs

Mastitis is an infection of the milk ducts. Also called mammitis or mastadenitis, during nursing, it can be caused by a breast (teat) engorgement (swelling). Mastitis can also be caused by a blocked milk duct. You may see cracked or damaged skin or tissue around the nipple. Bacteria get inside, either by a crack or even through the pores, and can infect the dam suddenly, even if the teat is not engorged. An engorged breast is a mild form of mastitis. Mastitis, if not treated, can lead to gangrene mastitis. Gangrene mastitis is caused by bacteria that do not require oxygen in order to grow (anaerobic bacteria). The skin turns black and dies, leaving a huge hole that will drain pus-blood. The dam will have a high temperature and needs antibiotics. Gangrene mastitis results in the dam losing the teat. If your dam develops mastitis, begin treatment immediately to avoid it turning into gangrene mastitis.

Teat with mastitis

Teat with mastitis, which is very common in Mastiff dams. This dam needs to go on antibiotics NOW. This is a medical emergency where TIME is of the essence. Mastitis is very aggressive and fast-moving, so the sooner antibiotics are started, the better chance of not having a blowout. A blowout is the swelling/infection that will try to come out the side of the breast, like a volcano that wants to erupt.


Notice how swollen the infected teat is

Notice how swollen the infected teat is. The breast is placed on a hot water bottle. Hot packs on the area are vital to the dam’s recovery.

The dam is on antibiotics and I am adding probiotics (acidophilus capsules or yogurt) to the puppies’ food.

Clavamox is an antibiotic and is given to the dam to help fight the infection

The antibiotic Clavamox is given to the dam to help fight the infection

There is mixed advice on whether or not pups should nurse on the infected teat. Some say yes and some say no. The treatment for mastitis in humans consists of letting the baby nurse on the infected side as much as possible, rotating the baby in a different direction each feeding to clear all parts of the milk duct.

Some breeders are concerned it may cause diarrhea, however in this case, the pups were allowed to nurse and they showed no ill signs from it. Allowing them to nurse greatly helped in the dam's recovery process. Remember, the pus is usually sterile once the dam's antibiotics have had about 48 hours to work. Pus is just the body's reaction to the infection. For the first 48 hours (before the antibiotics kick in) you have to watch WHICH pup nurses and watch for diarrhea and/or tummy upset. After that the antibiotics make the pus sterile. If you decide to skip the first 48 hours while the antibiotics kick in, you may be putting the dam's health in jeopardy. Hand-expressing the teat is not as effective as allowing a few pups to nurse. I think I caught this in the nick of time; waiting 12 hours and starting on antibiotics in the morning could have made this much worse.

You CANNOT let the pups nurse if you cannot monitor which ones did, and closely monitor those particular puppies. It is also not recommended to only place ONE pup (the same pup each time) on the infected teat if it can be avoided, so the pups can take turns nursing and will not solely get their milk from that teat, putting the pups’ chin closest to the tender spot. Rotate a few pups (the same few each time) on that teat, keeping track of who nursed and when. In this case I have let four of the 11 puppies nurse on this boob and they did not show any signs of stomach upset. This greatly helped in my dam's recovery. You do not want your dam to develope gangrene mastitis... Which would be next if left untreated or not treated properly.

The bottom line is, it is best for the dam's health to allow the pups to nurse on the infected teat. HOWEVER, you have to know what you are doing. The situation has to be monitored. Many breeders do not know the difference in their puppies and they wouldn't know which puppy nursed or which one had diarrhea and they don't put the time into it to find out. So a sick pup could get sicker. Because of that, a lot of vets will advise that the average person not allow the pups to nurse from the infected teat, assuming they will not keep a close enough watch on the situation. If you are an attentive breeder that KNOWS and monitors her puppies you could let them nurse. If you work, and the pups are in the basement and tended to once a day, don't let them nurse from that teat. You will have to duct tape that teat over. Keep in mind, duct taping the teat and not allowing the pups to drain the teat is putting the dam's health at risk and on the other hand, allowing the pups to nurse on the infected teat and not properly monitoring is putting the pups at risk. The best solution to this is to be attentive to your puppies. Keep track of which selected pups nurse from that teat. Rotate them so the same pup does not nurse from that teat twice in a row. Watch the pups who are allowed to nurse on that teat poop to ensure they do not develop diarrhea. If done properly, there will be no ill effects on the pups and your dam will have a better chance of recovering.

A compress of hot clothes soaked in vinegar can help the infection come to a head, allowing it to be reabsorbed by the body, preventing it from bursting.

The infection is not in the nipple, but way up high. mostly where my finger is pointing

The infection is not in the nipple but way up high, mostly where my finger is pointing, in the milk gland. Infections accumulate about two to three inches from the actual nipple and sometimes it is in between two nipples.

Just over 30 hours after onset

Just over 30 hours after onset, see the normal teat beside the infected one. At this time we are just praying the antibiotics were started in time, as the spot, up 2 inches, would be the blowout spot.

30 hours after onset

Massaging the breast to help loosen up the infection and allow the body to fight it more effectively. It is also good to continue draining the teat by hand to express out the infected milk and pus, not only for the pups’ sakes, but for the dam's sake. Mastitis will heal up quicker if you drain the breast as often as possible. When expressing, you need to get BEHIND the lump with your fingers and try to squeeze it out.

30 hours after onset

30 hours after onset

30 hours after onset

30 hours after onset

30 hours after onset

30 hours after onset

30 hours after onset

30 hours after onset

45 hours after onset

45 hours after onset—continue putting hot packs on the area. Hot-packing is the key to success. It helps the infection to come to a head without doing a lot of damage.


Sassy with her hot water bottle, which is being used as a heating pad for her mastitis treatment. You can also place the dam in a tub of warm water.

Placing a towel over the heat source helps hold the heat in.


Day 6 of mastitis

Day 6 of Mastitis - Things are clearing up

Things are clearing up.

Day 7 of Mastitis

Day 7 of mastitis, clearing up. The milk is coming out white, the swelling is down.

It is just scabs now

It is just scabs now.

Mastitis after 2 weeks, I BEAT IT... and the teat still works! All of the extra care put into getting Sassy better paid off!

Mastitis after two weeks—I BEAT IT...and the teat still works! All of the extra care put into getting Sassy better paid off!


Courtesy of MistyTrails Mastiffs


"I have a Lab that developed mastitis two weeks postpartum. I refused to let them start her on oxytocin to dry her up because I was hoping that she could go back to nursing after she felt better and the antibiotics kicked in. The vet gave me a head of red cabbage and told me to put that on the affected teat with warm compresses. I did that and an area approx. two inches from the nipple spontaneously ruptured and is now leaking bloody purulent discharge, but she looks like she feels much better."


"When I used my hand vibrator to move the milk down and the hot packs, the points of infection showed up on the other side of the teat. I had two points—one almost to the anus and another halfway down to the nipple, but not near the nipple like yours was. Before it could "burst" I started a very rigorous regimen of hot packs soaked in vinegar/water. My father used to treat boils with this and even now, when we get an infection, ingrown hair, etc., I will put vinegar/water hot packs and soak a Band-Aid with vinegar for bedtime. The vinegar brings the infection to a head and allows it to be re-absorbed by the body. My whole house smells like vinegar, but the points of infection didn't burst and they're almost all gone now. The puppies didn't mind the vinegar at all. None of them were swayed by the smell to stay away, and their nursing helped draw the milk down too."—Courtesy of Roedertor GSD

This is SG Roedertor All That Glitters CD and her litter of puppies; Sire is BIM CH Greenwood's Achilles—Courtesy of Roedertor GSD

"Here is a picture I took this morning. The red "bump" is a very soft "bubble-like" thing from where it came to a head and was getting ready to burst (looked as bad or worse as the picture you show where you point out the point it might burst—just before the first picture with a hand massage). The teat this morning is practically normal—very soft, except for an inner small piece of "hard" right behind the bubble. We'll watch it this morning and might end up putting the packs of vinegar back on it again tonight. The puppies are down to nursing twice/day and antibiotics were started last Friday, all of which I'm sure have helped heal this teat. She got sick last Friday—106.1 temp going up to 107.8 by the time we got to the vet. She had pancreatitis caused by a weakened immune system (infection when she was inseminated) and an overload of fat (I will never not pay attention to fat content again!!). You'd think I never had a litter before—that's what I get for trying something new! She's a very strong girl or she might not have carried this litter to whelping, but she did and they were all born healthy, but hungry—nine beautiful puppies! Of course the added food after whelping just contributed to the problem and eventually she couldn't handle it anymore. A sidebar to the pancreatitis was this bout with mastitis and at the time last Friday it was a solid "book" of hard that extended from up near her anus down halfway to the nipple. It took another four days or so before I saw the point that it would burst and before the "book" developed into two very definite points. It is so much better this morning. I used hot mixed with cold and the massage to get it to the point where it was concentrated instead of almost the entire teat; then started on the vinegar/water hot packs and they really pulled the infection out."—Courtesy of Roedertor GSD




Although this section is based on a whelping of an English Mastiff, it also contains good general whelping information on large-breed dogs. You can find more whelping information in the links above. The links below tell the story of Sassy, an English Mastiff. Sassy has a wonderful temperament. She loves humans and adores children. An all-around mild mannered, wonderful Mastiff, Sassy, however, is not the best mother toward her puppies. She is not rejecting them; she will nurse them when a human places them on her to feed, however she will not clean the pups or pay any attention to them. It is as if they are not her puppies. This litter is getting mom’s milk with major human interaction, manually giving each and every pup what they need. In return, the pups will be super socialized and will make remarkable pets, however the work involved is astounding. It takes one dedicated breeder to keep this situation healthy. Thankfully this litter has just that. Read the links below to get the full story. The pages within include a wealth of information that everyone can appreciate and benefit from.

C-Section in a Large Breed Dog

Newborn Puppies... What you need

Whelping and Raising Large Breed Puppies: 1 to 3 Days Old

Things do not always go as planned (imperforate anus)

Orphaned Litter of Pups (not the plan)

Raising Puppies 10 Days Old Plus +

Raising Puppies 3 Week Old Puppies

Raising Puppies 3 Weeks - time to start potty training

Raising Puppies 4 weeks old

Raising Puppies 5 weeks old

Raising Puppies 6 weeks old

Raising Puppies 7 weeks old

Socializing the Puppies

Mastitis in Dogs

Whelping and Raising Large Breed Dogs Main

Whelping and Raising Puppies, a new found respect


So You Want to Breed Puppies

Pros and Cons of Inbreeding Dogs

Stages of Puppy Development

Whelping and Raising Puppies: Breeding age

Reproduction: (The Heat Cycle): Signs of Heat

Breeding Tie

Dog Pregnancy Calendar

Pregnancy Guide Prenatal Care

Pregnant Dogs

Pregnant Dog X-Ray Pictures

Full-Term Mucus Plug in Dog

Whelping Puppies

Whelping Puppy Kit

First and Second Stage of Dog's Labor

Third Stage of Dog's Labor

Sometimes Things do not go as Planned

Mother Dog Almost Dies on Day 6

Whelping Puppies Unfortunate Troubles

Even Good Moms Make Mistakes

Whelping Puppies: A Green Mess

Water (Walrus) Puppies

C-Sections In Dogs

C-Section Due to Large Dead Puppy

Emergency Cesarean Section Saves Pups Lives

Why dead puppies in utero often require c-sections

Whelping Puppies: C-section Pictures

Pregnant Dog Day 62

PostPartum Dog

Whelping and Raising Puppies: Birth to 3 weeks

Raising Puppies: Puppy Nipple Guarding

Pups 3 Weeks: Time to start potty training

Raising Puppies: Pups Week 4

Raising Puppies: Pups Week 5

Raising Puppies: Pups Week 6

Raising Puppies: Pups 6 to 7.5 Weeks

Raising Puppies: Pups 8 Weeks

Raising Puppies: Pups 8 to 12 Weeks

Whelping and Raising Large Breed Dogs

Mastitis in Dogs

Mastitis In Dogs: A Toy Breed Case

Why are Toy Breeds are Harder to Train?

Crate Training

Showing, Genetics and Breeding

Trying to Save a Fading Dachshund Puppy

Whelping and Raising Puppies Stories: Three Puppies Born

Whelping and Raising Puppies: All puppies do not always survive

Whelping and Raising Puppies: A Midwoof Call

Whelping and Raising a Full Term Preemie Puppy

Whelping Small for Gestational Age Puppy

C-Section on Dog Due to Uterine Inertia

Eclampsia is Often Fatal for Dogs

Hypocalcemia (low calcium) in Dogs

SubQ hydrating a Puppy

Whelping and Raising a Singleton Pup

Premature Litter of Puppies

A Premature Puppy

Another Premature Puppy

Pregnant Dog Absorbing Fetus

CPR Needed to Save One Puppy

Whelping Puppies Congenital Defects

Puppy with Umbilical Cord Attached to Foot

Puppy Born with Intestines on the Outside

Gone Wrong, Vet Makes it Worse

Dog Loses Litter and Starts to Absorb Puppies

Whelping Puppies: Unexpected Early Delivery

Dog whelps 5 days early due to dead pups

Lost 1 Puppy, Saved 3

An Abscess on a Puppy

Dewclaw Removal Done Wrong

Whelping and Raising Pups: Heat Pad Caution

Whelping and Raising a Large Litter of Dogs

Whelping and Raising Dogs While Working

Whelping a Messy Litter of Pups

Whelping and Raising Puppies Picture Pages

How to Find a Good Breeder

Pros and Cons of Inbreeding

Hernias in Dogs

Cleft Palate Puppies

Saving Baby E, a Cleft Palate Puppy

Saving a Puppy: Tube Feeding: Cleft Palate


Whelping: Close-to-Textbook Case

Puppies' Progress Chart (.xls spreadsheet)

Cuban Mysti Puppies: Full Term Mucus Plug - 1

Cuban Mysti Puppies: Labor Story 2

Cuban Mysti Puppies: Labor Story 3

Cuban Mysti Puppies: One-Day-Old Pups 4

Easy Delivery a Day or Two Overdue


What's New on DBIC Newsletter!

* Email

About Dog Breed Info Center®
Understanding Dog Behavior
Natural Dogmanship
What does it mean to be dominant?
Successfully Adopting a Rescue Dog
Transforming a Rescue Dog
Proper way to walk a dog
Raising a Puppy
Why did my dog do that?
Speaking Dog
Small Dog Syndrome
Dominant Behaviors in Dogs
Jumping Dogs
FAQ about dogs
Alpha Boot Camp for Dogs
The Human Dog
Ready For a Dog?
Dog Bite Survey
Dog Breed Popularity Survey
Dog Breed Quizzes
List of Dog Names
Dogs Caught in the Act
Those Amazing Dogs
Dog Care Training and More
Designer Dogs? What?
Pictures of Mixed Breed Dogs
Puppies vs. the Adult Dog
Chaining Your Puppy or Dog
So, you want to breed your dog...
Feeding Puppies and Adult Dogs
Corn in Dog Food. Really?
Collectible Vintage Figurine Dogs
Success Stories & Positive Feedback


All Breeds - Purebreds - Hybrid Dogs - Understanding Dog Behavior - Raising a Puppy - Find the Perfect Dog - Dog Breed Quizzes - Pets - All Creatures - Care Training+ - Whelping Puppies - Photos - Submit a Picture - Breeders vs. Rescues - Spike the Bulldog - Maguire Farm - Scam Warning - Privacy Policy - Contact Us - Site Updates


Successfully Adopting a Rescue Dog - Adopt a Rescue Dog


DBI Advertiser Policy - Classifieds/Breeder - Puppies for Sale



Custom Search

The Material contained herein may not be reproduced without the prior written approval of the author. Contents & Graphics Copyright © Dog Breed Info Center® (C) 1998- . All Rights Reserved. Our work is not Public Domain.