Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Cat Mammary Cancer: When to Euthanize: Vet-Approved Guide & FAQ

vet checking up the cat

You know that you’ll have to make a difficult decision when you find out that your beloved pet is reaching the end of their life. Unfortunately, mammary cancer is one of the most aggressive forms of cancer in cats, and it can take an emotional toll on both you and your pet. To make an informed decision about euthanasia, you should understand the signs and progression of this disease.

divider cat paws oct 2024

What Is Mammary Cancer?

There are different types of mammary cancer that can affect cats but the most common is mammary carcinoma. This tumor forms firm swellings or nodules in the mammary glands of cats. It is most commonly seen in older female cats that have not been spayed. Unfortunately, this cancer often spreads to other mammary glands, lymph nodes, and the lungs.

A cat having a check-up at a small animal vet clinic
Image Credit: Tyler Olson, Shutterstock

Prognosis

If mammary tumors are caught early and surgically removed before they have spread, the treatment is much more likely to be successful, and the prognosis is better. Vets will usually do further diagnostic tests, such as X-rays and ultrasound, to assess how far the cancer has progressed and to be able to give a better idea of the prognosis. Sometimes, chemotherapy will also be offered.

divider cat paws oct 2024

Signs It Might Be Time to Euthanize a Cat With Mammary Cancer

Unfortunately, cat mammary cancer is an aggressive cancer, and treatment is not always successful. Even after surgical excision, the cancer can either recur within the mammary glands or have already spread elsewhere in the body. Deciding when to euthanize your pet can be an emotional and difficult process, but it may be necessary for humane reasons if their quality of life is significantly compromised.

cat owner man talking to veterinarian
Image Credit: silverblackstock, Shutterstock

How Will I Know When It Is Time to Euthanize My Pet?

Your veterinarian will be able to assess your pet’s condition and advise on whether euthanasia is the best course of action. Ultimately, the decision is up to you as the owner, but it can be helpful to consider factors such as quality of life and pain levels.

Signs that it may be time to discuss your cat’s quality of life with a vet include:

  • Your cat has lost their appetite.
  • They have significant weight loss.
  • They are weak and lethargic and have trouble moving around.
  • They are not taking an interest in things they normally enjoy.
  • They are having difficulty breathing.
  • The tumors in their mammary glands are ulcerated and open.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

divider cat paws oct 2024

What Is the Process of Euthanasia Like?

The veterinarian may provide your pet with a sedative to keep them calm if they are nervous or agitated, and then an injection is given that is designed to quickly and peacefully end their life. The injection is an overdose of an anesthetic, and your cat will quickly lose consciousness and won’t feel pain. Death occurs within a few minutes when the heart stops beating.

How Can I Cope With the Loss of My Pet?

Losing a beloved pet can be emotionally devastating, especially if they have been living with a terminal illness. It is important to remember that you are not alone and that there are resources available to help you through this difficult time. Talking to a veterinarian or friends and family members who have had experience with pet loss can be very helpful. You may also find comfort in joining a local pet loss support group or talking to a counselor who specializes in grief and bereavement counseling.

Are There Any Resources to Help Me Through This Process?

Yes, there are a number of great resources available to assist you in coping with pet loss and the decision to euthanize your pet. A veterinarian or animal hospital can provide advice and support, and there are many online support groups and websites dedicated to pet loss.

divider cat paws oct 2024

Choices for Honoring the Remains of Your Pet

Once your pet has passed away, you may find solace in honoring their memory. There are a number of options available for this, such as burial or cremation. Burial can be done on your property if allowed by local laws or at a pet cemetery. Cremation is another option, and the ashes can then be scattered in the place of your choosing or kept as a memento.

cremated remains of a pet cat
Image Credit: umaruchan4678, Shutterstock

Special Ways to Remember Your Cat

No matter how you choose to honor the remains of your pet, there are also special ways that you can remember them. You may want to consider writing down your favorite memories or creating a photo album of your time together. You could even plant a memorial tree or create an online memorial where friends and family can share their own stories and fond memories.

Facing the Loss of Your Pet

The loss of a beloved pet can be devastating, but it is important to remember that you have done all that you can for them. Taking care of your emotional well-being during this difficult time will help ensure that you can cope with the grief in a healthy manner. It is okay to take some time for yourself and lean into support from family and friends if needed. Remembering the happy memories of your pet and honoring their memory are powerful ways to move forward and begin healing.

divider cat paws oct 2024

Conclusion

Making the decision to euthanize a beloved pet due to mammary cancer is never easy. However, understanding the signs, diagnosis, and prognosis can help you make an informed and compassionate decision. Be sure to consult with a veterinarian on any questions or concerns you may have about the condition of your pet and whether euthanasia might ultimately be best for your cat.


Featured Image Credit: PRESSLAB, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

8 Best Wet Cat Foods in Australia in 2025 – Reviews & Top Picks

There are many benefits to introducing wet cat food into your cat’s diet. It contains more moisture to help your cat stay hydrated,...

Japanese Bobtail Longhair: Info, Pictures, Care, & Traits

Japanese Bobtail Longhairs are a gorgeous longhaired version of the traditional Japanese Bobtail. These kitties have easy-to-maintain long, silky coats and the trademark...

Why Does My Cat Lay on My Stomach? 5 Vet-Verified Reasons

When you’re sitting still or lying down for long enough, it’s perfectly normal for your cat to come around and try to spend...

8 Best Waterless Cat Shampoos in 2025: Reviews & Top Picks

Cats are known for their grooming, as they spend such a large part of their day, every day, bathing themselves. But sometimes your...

More related

Can Cats Get Kidney Transplants? Our Vet Discusses Facts & Considerations

Kidney disease is one of the most common causes of illness and death in cats, with almost 80% of cats over 15 years...

Cat Litter: Why It Pays to Get It Right

Hi, I’m Dr. Karyn! Read my introduction to learn more about me and meet my five hilarious cats: Clutch, Cyril, Alex, Zelda, and...

Living With Cat Allergies — 8 Vet-Approved Tips & Tricks

Cats are wonderful, loving animals that can bring a great deal of joy and enrichment to your life. Unfortunately, though, some people are...

Can Cats Eat Sausage? Vet-Reviewed Nutritional Facts & FAQ

As cat lovers, we all want to spoil and treat our feline friends, but we also want to keep them happy and healthy....

Keep reading

How to Stop a Cat From Climbing a Christmas Tree: 6 Vet-Reviewed Safety Tips

Christmas is a time to decorate your home with decorations to get you in the holiday spirit. One such decoration that is found in most homes is, you guessed it, Christmas trees. It’s fun to put up a tree, and...

cat hiding in the Christmas tree

Do Cats Get Morning Sickness? Vet-Approved Signs & Facts

Morning sickness is a widely known issue for pregnant women. Hormonal and physical changes lead to nausea, especially during the morning throughout the first trimester of pregnancy. It can be a really miserable experience, especially if you can’t get the...

sad sick cat

Are Baby Wipes Safe to Use on Cats? Vet-Reviewed Facts & FAQ

For the most part, cats are rather self-reliant creatures. They do a majority of their bathing and grooming and only occasional input from you is necessary. But there are times when felines need a little additional help to stay entirely...

Catster_Are Baby Wipes Safe for Cats

How Long Do Cats Live? Feline Lifespan Facts Explained (Vet Approved)

We’ve all heard that cats have nine lives. But how much of that is actually true? Do cats seem to escape brushes with death regularly? If the cat lives an expected average of years, how long is that usually? According...

Silver Tabby Norwegian Forest Cat

Why Does My Cat Sit and Sleep on My Desk? 8 Possible Reasons

Cats are interesting animals, which is one reason why they’re enjoyed as household companions by humans from all walks of life throughout the world. One quirk that many cats have is a fascination with sitting on our desks whether we’re...

Young man using laptop at table with cute cat

Do Cats Get Lonely When You Go on Vacation? Everything You Need to Know!

It can be easy to buy into the idea that cats are antisocial, aloof creatures. After all, most cats spend a good part of their time alone, whether under your bed, in a closet, or in some other hiding spot....

Man checking flight details at the airport

Why Do Cats Like Boxes So Much? 6 Vet-Reviewed Reasons Behind the Behavior

How many times have you cut a delivery box open only to turn around and find your cat has already made themself at home inside of it? Probably every time. A cat’s natural curiosity draws them in, and then their...

cat in a cardboard box

How to Collar Train a Cat: 8 Vet-Approved Steps

When you think of collars, you might automatically think of dogs. But collars can also be useful for cats (and in fact, they should be used in certain situations), and you can choose from a few types. Choosing and fitting...

a cat with collar on sitting on the floor