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Concurrent Tumor (Cancer) and Heart Disease

We often receive consultations from pet owners whose dogs or cats have both tumors (cancer) and heart disease. We have summarized some approaches (suggestions) that may be helpful.

I have a 12-year-old Cavalier. Since the age of 7, I’ve been taking him to a vet regularly because of heart murmurs. During a recent check-up, what appears to be a tumor was found in his intestine. The vet mentioned that anesthesia would be required for further examination of the tumor, but because of his heart condition, I want to avoid anesthesia. The vet also mentioned the risks associated with anesthesia, which worries me.

While I’ve been advised to monitor the situation, it is tough to do nothing and just watch. Is there any other measure I can take?

Cavaliers are particularly prone to mitral valve disease, so it is excellent that you are conducting regular check-ups. Given your dog’s age and the presence of a tumor, his immune system is likely quite weakened.

By restoring the compromised immune system to its normal state, it is expected that the activity of the tumor can be suppressed, or even the tumor itself can be reduced.

Even if a reduction in the tumor is not observed, there are cases where dogs can peacefully coexist with the tumor while maintaining their quality of life (QOL).

Regarding the heart murmur in your dog, how severe is the heart disease?

As a basic approach, try to boost the immune system without putting too much strain on the body. Additionally, actively review his diet by referring to the articles summarized here.

Cordy conducts research with the goal of suppressing tumor cell activity by normalizing immune regulation. As it places almost no burden on the body, Cordy can be safely administered to dogs with heart conditions or elderly dogs with low stamina. There are clinical studies where it has been administered in similar cases.

If the heart disease is not severe and there is always someone available to monitor your dog, it is also recommended to give a supplement containing organic germanium. Organic germanium can potentially improve blood circulation and alleviate pain.
*Please avoid using supplements containing organic germanium if your dog usually breathes rapidly, has heart or lung conditions, or experiences seizures, and there is no constant supervision.

If your dog has poor intestinal health, experiences diarrhea or constipation, or has digestion issues, consider giving a probiotic supplement.


If you have any questions, please contact us.

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However, if you can only divide the dosage once or twice a day, or if the heart disease is severe, there is a concern that the blood flow-promoting effects may put a burden on the body. In such cases, please use Cordy that does not contain organic germanium.