When another disease comes too — old cats rarely carry one illness alone

HCM is often found in older cats, and in an old cat's body, diseases rarely arrive alone. The kidneys may already be failing, the thyroid overactive, the blood pressure high — and these conditions make opposite demands. The heart asks for water to be taken away while the kidneys ask for more; the thyroid imitates the heart; hypertension disguises itself as heart disease. This …