#5 They're Robust to the Brim
It’s nature. When animals can breed on their own, nature has a way of selecting the best genes, allowing the strongest and the fittest to be born. A moggy is often genetically primed to be healthier, smarter, and more robust than her purebred cousins. In fact, many moggies have been found to be less likely to suffer from the diseases their purebred conterparts.