It's no secret that owning a dog requires a significant financial commitment. Your new four-legged companion can bring enormous happiness to your life, but they come with a fair share of expenses too. Food, vaccinations, toys and, of course, the dreaded vet's bill can all mount up surprisingly quickly, leaving your bank account considerably depleted. That said, certain breeds are far less susceptible to illness, which could save you a tidy sum should you choose to welcome one of these