Cancer Active
Cancer Prevention Cancer Treatment Support Us Online Shop
Chris Woolmams / Catherine Woollams
The staggering statistics on pet cancer – cats and dogs

Almost one in two dogs over the age of 10 years will develop cancer. A figure of 47% compares with cats at roughly 32%. Cancer is the number one disease which kills pets.

Types of pet cancer - Approximately one third of the cancers in dogs are skin cancers. Dogs also develop more types of cancer, in a similar way to humans – breast cancer, bone, head and neck, lymph, gut and so on. Thus, dogs develop breast cancers that spreads to the bones; they also develop prostate cancer.

After skin cancer, breast cancer and leukemia are the most common cancers in dogs while lymphoma is the most common cancer in cats. 

Breeds and cancer in dogs - There seem to be links between cancer incidence and different breeds. For example, Rotweilers are at the top of the list with bone cancer common; and other large dogs like Great Danes (osteosarcoma), Mountain dogs, German Shepherds are more prone to cancer. 

Causes of pet cancer - While many people suggest this points to a genetic predisposition to cancer, others have shown their cancers are linked to factors common with humans – for example, Labradors become fat if they don’t get enough exercise, and that leads to more illnesses and cancer; and many dogs live beyond their normal lifespans in the modern world. Often food is not freshly prepared but tinned or dried. There are suggestions that animals that groom themselves more frequently may develop more cancer – possibly due to environmental toxins on their coats. Animals in households where there is cigarette smoke seem to develop more cancers. 

Human causes of pet cancer - People also don’t clean the pet food bowls often enough or leave ageing food there. They may serve out of date food or store it badly, for example, leaving dried food unsealed.

Cancer symptoms in pets are similar to those in humans – they may feel pain in a limb, exhibit a lump, lethargy, changed bowel or urine habits, blood in stools, weight loss, persistent coughs, an abnormal odour and more.

Cancer in cats – The most common is lymphoma which is associated with feline leukemia virus (FeLV). Although cats have only half the rate of cancer than developed by dogs, cat cancer tends to be more aggressive. They develop more oral cancer but whereas cats used to develop quite high levels of mammary cancer, higher levels of spaying have cut this. 

What is interesting is that cats develop quite high levels of fibrosarcoma or soft tissue cancer, which develops in muscles or connective tissue following an injection or vaccination!


Want the latest news on this?
Print This Page
  Search Website
Follow us on:
Follow us on Facebook Follow us on Twitter

Heal Your Gut  
Part 1:  The importance of the microbiome 

More info? See

CANCERactive Website Appeal

Thank you for helping us to raise a fantastic £19,708 for our new CANCERactive website which will be launched in 2018

Select a donation amount:
Enter a donation amount:

Gift Aid:
So that CANCERactive can claim back 25p for every £1 donated, I confirm that I am a UK tax payer, who has paid over enough tax for you to reclaim this amount

Sign up for icon


Our icon magazine is available free in over 500 UK hospitals, cancer centres and libraries. Full of great articles and the very latest cancer information, you can have it sent to your own home.

Buy online

The CANCERactive Patient Group (CAPG) – Run by Patients, for Patients

  • Tell your Story
  • Start a Blog
  • Start a Diary Blog
  • Start a Discussion
  • Ask a Question

Search Drugs


Quick search for YOUR DRUG here  

Search Drugs


Quick search for a COMPLEMENTARY THERAPY here 

Search Complementary Therapies



Search Alternative Therapies

Important Notice

At CANCERactive we provide information that is already in the public domain.  It is not our intention to provide advice. It is up to the reader to decide if any of the matters to which any article refers might be suitable for them.


Follow CHRIS WOOLLAMS, the UK's number 1 cancer researcher, on his free e-news and keep right up to date with the very latest cancer information and research

 click here

  click here

click here


CANCERactive information and publications (books, magazine and leaflets)

CANCERactive compiled books

Heal Your Gut Heal Your Body

A real paradigm shift - this book will help you really understand exactly what to do to be in great health.

Click here to find out more.

The Brand new 4th edition of Everything You Need to Know to Help You Beat Cancer

"This book is head and shoulders above the rest". Geoffrey Boycott

Click here to find out more.

The Rainbow Diet - and how it can help you beat cancer

"At last the definitive book on a diet to fight cancer". Mrs BS Devon.

 Click here to find out more...

Brand new 3rd edition of Oestrogen The Killer in our Midst

"Learn how to take control of your oestrogen levels"

 Click here to find out more...

CANCERactive magazine (free in hospitals and complementary cancer centres)


Free downloadable prevention leaflets


Buy online

Donate to Us

We can only help people like you - if people like you help us!

Buy online

Fund Raising


Interested? Click here for more information

Click here to see all our fundraising events.

Click here and see what events are taking place and perhaps sponsor one of our supporters. 

Click here for other ways to raise money for CANCERactive.

Or if you want more information about our other fun activities, the Peru trek, our sky diving etc. click the button below.

Click here for our Just Giving page and see what our supporters are doing for us.

Click here for our Virgin Money Giving page.

Buy online

Visit a Catherine Corner

Catherine Wollams

Buy online

Need a Support Group?  

Find a cancer support group near you, now.
Buy online

So what is the truth behind mammograms, drug clinical trials, the PSA test and prostate surgery, and the stories you read in the press?Go to Junk Science to read the unbiased truth. Click Here.


Do you have a problem with our factual content?

If you have research which conflicts with ours, just address it to 'The Medical Board'. Ever since we started this site we have had an 'open-mind' policy and have expert oncology doctors and professors who will address your concerns.

© Copyright 2018 CANCERactive. All Rights Reserved. This content may be copied in full, with copyright, contact, creation and information intact, without specific permission, when used only in a not-for-profit format and provided, where used to publish on a website, that website provides a link to If any other use is desired, permission in writing from CANCERactive is required.
All content and images © Copyright 2018 - Website design and maintenance by a Web design and Search engine marketing company