First of all, lets say, what crossbreed is. It is a dog, that have two purebred parents. On the other hand, purebred dogs are dogs that are bred for many generations and every puppy is born with similar appearance and temperament.
The crossbreeds have tendencies to be healthier. It is because, purebred dogs have a small gene pools, and they are more likely to have a recessive disorders. A purebred puppy have bigger chance to inherit two copies of defective genes. Crossbreed comes from two different gene pools, so they have smaller chance to inherit two copies of defective gene.
But being a crossbreed does not make a dog illness free pet. They are still prone to similar health problems as their parents. Watch our video about this topic to learn more: