My Dog Was Just Diagnosed with Cancer. What Should I Do First?

Hearing that your dog has cancer can be frightening and overwhelming. You may feel pressure to make immediate decisions, but many canine cancer diagnoses do not require you to decide everything on the same day. Unless your dog is experiencing an emergency, take a breath and focus on gathering the information you need to make a thoughtful decision.

1. Confirm the exact diagnosis

Ask your veterinarian for the specific name of the cancer and how it was diagnosed. A lump or abnormal finding does not always provide enough information to create a treatment plan. Cancer is generally confirmed by examining cells or tissue collected through a fine-needle aspiration, biopsy, or surgery.

Request copies of your dog’s:

• Cytology or biopsy report

• Bloodwork

• Imaging reports

• Medical records

• Current medication and supplement list

Having these records together will make it easier to obtain a second opinion or consult a specialist.

2. Ask whether additional testing is needed

Your veterinarian may recommend staging tests to determine how extensive the cancer is and whether it has spread. Depending on the type of cancer, this may include bloodwork, urinalysis, chest X-rays, abdominal ultrasound, lymph-node sampling, CT, MRI, or other testing.

Not every dog needs every test. Ask how each proposed test could affect the treatment plan before proceeding.

3. Consider consulting a veterinary oncologist

A board-certified veterinary oncologist has advanced training in diagnosing, staging, and treating cancer in animals. An oncology consultation does not commit you to chemotherapy or any particular treatment. It gives you an opportunity to understand the available options, expected outcomes, potential side effects, costs, and what may happen without treatment.

Your primary veterinarian may remain closely involved in your dog’s care even when an oncologist is consulted.

4. Ask about the goal of treatment

Cancer treatment does not always have the same goal. Depending on the diagnosis, treatment may be intended to:

• Cure the cancer

• Put the cancer into remission

• Slow its progression

• Reduce the size of a tumor

• Relieve pain or other symptoms

• Maintain a good quality of life for as long as possible

Understanding the goal can help you decide whether the recommended plan is right for your dog and your family.

5. Address your dog’s immediate comfort

Ask whether your dog is experiencing pain, nausea, inflammation, breathing difficulty, poor appetite, anxiety, or another symptom that should be treated now. Supportive care may include pain medication, anti-nausea medication, appetite support, hydration, nutritional guidance, or palliative care.

Comfort should be addressed whether you choose aggressive treatment, conservative treatment, or hospice care.

6. Begin tracking changes at home

Keep a daily record of your dog’s:

• Appetite and water intake

• Energy and activity

• Mobility

• Breathing

• Bathroom habits

• Pain or discomfort

• Medications and side effects

• Mood and interest in family activities

• Good days and difficult days

These observations can help your veterinary team recognize patterns and determine whether treatment or supportive care needs to be adjusted.

7. Avoid making sudden diet or supplement changes

It is natural to search for foods, supplements, or natural approaches that may help. However, some supplements can interact with chemotherapy, radiation, anesthesia, steroids, blood thinners, or other medications.

Before adding anything new, give your veterinarian or veterinary oncologist a complete list of everything your dog receives, including herbs, mushrooms, CBD products, vitamins, and over-the-counter products.

8. Prepare a list of questions

Helpful questions for your veterinarian include:

• What is the exact type, grade, and stage of the cancer?

• Has it spread, or what testing would determine that?

• What treatment options are available?

• What is the goal of each option?

• What outcome might we expect with and without treatment?

• What side effects or complications should I watch for?

• What symptoms would require emergency care?

• How will we measure my dog’s quality of life?

• What will treatment cost?

• Is a veterinary oncology referral recommended?

Most importantly

There is not one universally correct decision for every dog with cancer. The best plan considers the type of cancer, your dog’s overall health, expected quality of life, potential benefits and burdens of treatment, your family’s circumstances, and what matters most for your dog.

You do not have to solve the entire cancer journey today. Start by confirming the diagnosis, learning whether the disease has spread, addressing your dog’s comfort, and understanding the options available.