# Cães e Pesquisa Antienvelhecimento Existem mais de 400 raças de cães. Por que cães castrados vivem mais? This page does not yet have an agent-readable markdown version. Canonical: https://diagnosticdetectives.com/products/dogs-and-anti-aging-research-there-are-4-species-of-dogs-why-neutered-dogs-live-longer-8