Yes, chemotherapy affects dogs, but typically much less severely than humans because veterinarians use lower doses and less intense protocols, focusing on maintaining quality of life; common side effects like mild nausea/diarrhea are manageable with medication, while serious issues like bone marrow suppression and hair loss are less common, though possible.
It is reasonable to minimize the opportunities for your pet to excessively lick you, your children, and your other family members immediately after treatment.
Most pet bacteria and viruses do not affect humans. But they can compromise your pet's health. This makes your pet more likely to get infections that spread to you, put your health at risk and cause problems during your chemotherapy.
The most common side effect of chemotherapy for dogs is gastrointestinal upset causing poor appetite, vomiting, and diarrhea. This usually happens within three days of treatment and lasts three to five days.
Additionally, some dogs that aren't trained to detect skin cancer and other malignant tumors have shown the ability to detect that something may be wrong. In some cases, dogs have been known to persistently lick, sniff or even nip at melanoma lesions on a patient's skin.
Stenzel notes that in case studies, dogs persistently sniffed, licked and nipped at melanoma lesions on their owners' skin, even through clothing, prompting the owners to identify the cancerous sites and seek care from clinicians.
The oncologist may plan to administer chemotherapy in cycles of 1–5 days each, with 2 days off, for a total of 7 days (7-day rule chemotherapy), or continuously for 1–5 days per session and rest for 3–4 weeks to allow the white blood cells and the body to recover and be ready for the next session.
This can lead to low blood cell counts, which are the most common side effect of chemotherapy. There are different types of low blood cell counts. A low white blood cell count (neutropenia) increases the risk for infection, which could be a medical emergency.
The dog will not be cured by chemotherapy but may have its life prolonged from 2–24 months [12,13]. The dog may feel better, still suffering from the cancer, or it may suffer from the side effects of the treatment.
Gastrointestinal tract: The most common side effects are nausea, decreased appetite, vomiting, diarrhea and lethargy. If any of these side effects occur it will usually happen two to five days after treatment. Fortunately, we have reliable medications that can help to minimize and control these side effects.
For at least 48 hours after chemotherapy, all patient body fluids and waste can contain the medicine. This includes urine (pee), stool (poop), and vomit. These body fluids can be a health risk for family caregivers or others. During this time, all caregivers must follow safety precautions.
“If you're on a strong chemo regimen, usually the day after is when you'll experience the worst symptoms,” says Iheme. “By worst, I mean you'll experience the most fatigue, weakness and nausea. Normally, three or four days after chemo, your symptoms will get better.”
If you have a weak immune system, having a pet can put you at risk for serious illness from diseases that can spread from animals to humans. Learn what you can do to protect yourself and stay healthy.
After each chemotherapy session, the drugs may stay in your body for up to a week. During this time, very small amounts of the drugs may be released from the body in your vomit, urine (wee), faeces (poo), blood, saliva, mucus (phlegm), sweat, and semen or vaginal discharge.
These problems can make it harder for you to cope with your treatment. Sometimes, people lose their appetite for a short while, but some people lose their appetite for days or weeks. Let your cancer care team know if your appetite changes as soon as you notice it, before, during, or after treatment.
Animal experts are in agreement on one scientifically proven fact: It is highly unsanitary for your dog to lick around your face, eyes, and nose! Dogs have been proven to carry various bacteria in their mouths that can be beneficial or non-effective to their overall health.
Your partner should avoid handling the pet's feces and delegate tasks like cleaning up after the dog, emptying the cat's litter box, and cleaning aquariums or cages to someone else. It may be hard, but my general advice to cancer patients is to not share the bed with pets during treatment.
About 80-85% of pets show no adverse reactions to their chemotherapy, with fewer than 10% of patients requiring hospitalization and intensive care to manage their side effects. For people and pets, cancer is no longer seen as a death sentence, but as a chronic disease.
Side effects of chemotherapy treatment for older dogs
While canine patients generally take well to chemotherapy there are some side effects that can happen to patients of any age, such as stomach discomfort, lethargy, and a weakened immune system.
Signs of improvement can show up early in chemotherapy. These signs include tumor shrinkage on scans, lowered tumor marker levels in blood tests, and better blood counts. Healthline says these signs help doctors see if treatment is working.
Additionally, the patient must flush the toilet twice after each use and the bathroom to help dilute the chemo in the wastewater system.
During and after cancer treatment with chemotherapy, up to 75 percent of people experience thinking and memory problems known as “chemo brain.” [2] Chemo brain can also cause anger — a phenomenon sometimes called “chemo rage.”
3. If you have severe night sweats, sleep in a separate bed. “Sweating a little bit during the night is fine, but if you're getting drenching sweats that soak the sheets, you may want to sleep separately from your partner,” says Patterson. “And wash your pajamas and sheets thoroughly.”
The cancer is actively growing despite the treatment. Blood tests that track proteins made by cancer cells show a consistent rise. The overall cancer activity in the body is increasing. Symptoms like pain, fatigue, or breathing issues are getting worse instead of better.
Additional foods that should be avoided during or immediately following some cancer treatments include: