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Symptoms Of Bone Cancer In Dogs – How To Spot

Symptoms of Bone Cancer in Dogs – How to Spot

As dogs enter old age, from 7-9 years, they become weak and vulnerable to diseases. A harsh ailment confronting some dogs is osteosarcoma (OS) –cancer of the bones. Untreated, it rapidly spreads, and dogs diagnosed suffer an early death. Let’s find out exactly what the symptoms of bone cancer in dogs are.


According to the Nation Canine Cancer Foundation, OS accounts for about 85% of all malignancies originating from the skeleton. In all cases, cancer tumors grow deep within the bones, leading to excruciating pain. With no cure, dog owners can only hope to relieve the pain and prolong life using conventional cancer treatments.


big breed dogs bone cancerAffects Giant and Large Breeds Dog the Most

Dogs that are under 30lbs account for 5% or less, of all diagnosed cases. Giant and large breed dogs are more afflicted because of size and weight. Mostly, the median age of the development of the condition is seven years.


Giant dogs breed most affected include the Bernese mountain dog, Great Dane Great Pyrenees Irish Setter, Newfoundland, and Saint Bernard.


For large breeds, examples include Boxer, Doberman pinscher, German shepherd, Golden Retriever, Rottweiler, and Weimaraner.


Areas Where Tumors Grow

swollen limb bone cancer in dogsAccording to the Nation Canine Cancer Foundation, osteosarcoma may affect any bone. However, limbs comprise up to 75-85% of the infections. It can also attack the axial skeleton made of the spine, ribs, etc.


In addition, symptoms of bone cancer in dogs can manifest in other parts of the canine’s such eyes, bowels, kidneys, liver, mammary tissues, etc. But first, tumors, will sprout from the bones and grow outwards.


Younger dogs diagnosed with OS, from 4 1/2 to 5 1/2 years have tumors in the ribs. Though rare in smaller breeds, when it occurs, it chiefly affects the axial skeleton.


Symptoms of Bone Cancer in Dogs

If you are concerned that your pooch is at risk, look for these signs. Your point of focus should be on the limbs because it is where the tumors predominantly grow. Check for:


  • Limping: OS will cause pain and discomfort; subsequently, lameness will occur. Also, swelling in affected areas may be noticed.


  • Fractures: Evidently bones afflicted with tumors are weak, and slight impacts may lead to cracks. Also, fractures may occur in the sites with swelling.


  • Breathing: Difficulty in breathing, with frequent sneezing, may come about. The dog can become fatigued and lose appetite.


  • Reduction in Weight: This can go hand in hand with lost appetite.


In addition to these symptoms, other signs exist depending on the location of growths. For instance, dogs affected by cancer at the jawbones may have trouble opening the mouth.


Remember to:

Nurture the habit of checking for small lumps under the skin. Don’t ignore small ones since OS can propagate very fast due to its aggressive nature. Furthermore, watch out for unexplainable, rapid weight loss, snapping and appetite changes.


Most symptoms of bone cancer in dogs can go unnoticed, thus be extra cautious especially for old dogs (7 years+). If you sense that the dog is in trouble, take them to the vet.


At the Vet: Causes of Osteosarcoma

You Might Ask, Why My Dog?

Unfortunately, the causes of the ailment remain a mystery. However, researchers have attributed the onset of OS, to the possible injuries of the growth plates in the bones. The slight injuries occur due to repeated trauma due to the weight of fast-growing large puppies.


Dogs with previous fractures and those that have undergone surgeries are also at high risk. Particularly during operation, if metal implants or bone transplants were inserted, the dog’s probability of developing OS is thought to increase.


To Lower the Risk, You Can:

Avoid giving your dog foods that trigger fast, uncontrolled growth. Instead, provide them with a healthy diet accompanied by natural supplements such as CBD dog treats; we will get to it in a bit.


At the Vet: Diagnosing

The disease progresses in three stages. First, the dog will have low-grade tumors, which become high-grade tumors and finally, metastasis occurs. Though it is challenging to spot, X-rays for the dog’s chests are the first tests conducted. They also help in determining the stage of cancer. The vet can draw fluids from the canine’s lymph nodes if they are swollen.


When placed under the microscope the doctor can check for abnormalities. Further tests conducted on the animal include blood tests, scans of the bones, and CAT scans.


labrador-amputation-bone-cancerTreatments for the Symptoms of Bone Cancer in Dogs

Realize that, the goals of cancer treatments, similar in humans, are to prolong life and reduce the pain. The best step is identifying and stopping the ailment earlier on.


Dogs at the third stage (metastasis) have a 10% chance of making it past one year. During this situation, amputation of the affected part is done, to promote their survival.


Other Treatments: Chemotherapy, Surgery, and Radiation

Chemo drugs prescribed aim to kill all rapidly-diving cells in the animal’s body. However, they must be used in conjunction with surgery. The therapy is highly disadvantageous because drugs also kill healthy cells.


Unlike amputation, limb-surgery involves the replacement of the affected bone with a metal implant. It is done where the tumors are not extensive are small confined only to the bone.


Radiation is administered to the tumors, though it is not highly effective in killing all the cells. It is only done to slow the progression of the disease and improve the pain.


Alternative Treatments

Many studies have already shown that CBD may help aid the relief of many cancer and chemotherapy side effects like pain, nausea, vomiting & loss of appetite.


Studies have also shown that CBD may hold many anti-cancer properties such as blocking cell growth, preventing the growth of blood vessels that supply tumors, antiviral activity & relieving muscle spasms caused by multiple sclerosis


CBD has been shown to possess numerous benefits to humans as well as to animals. Sources: ,


To learn more about CBD and its health benefits for dogs, read this informative short guide.


You might also enjoy our full Conditions & Ailments guide.

This Post Has 3 Comments
  1. Hi. I have a 7 year old German Shorthair Pointer and we found out about a week ago she has bone cancer. She has good days and bad days and I noticed last night that she is losing her hair and we do not have her in Chemo. I LOVE my baby and I have been devastated by this news and this hair thing is now freaking me out. I’ve looked up side effects to all the medicine she is on and none say hair loss and like I said she is not going through chemo. Idk. This whole thing just stinks. I am very upset and worried. If you can provide any answers or words of wisdom I would greatly appreciate it. Thank you, Rebecca

    1. Hello Rebecca. Sorry to hear about your dog. I know that hair loss from allergies and other skin conditioned can be reduced with the use of CBD but I’m not sure if it will have the same effect on hair loss caused by cancer. Here is a list of research and studies done on the use of CBD for cancer:

      I can say that CBD can also help treat the other side effects caused by cancer (pain, nausea, appetite loss, inflammation). Hope this helps.

    2. Hi Rebecca. I found out 2 weeks ago that my pointer mix has bone cancer. I like you am devastated and am not looking forward to what is ahead. Would like to connect with someone who is also going through it. Please let me know if you would like to keep in touch to get each other through.


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