You might think that it would be quite hard to tell if a pig is healthy or not by just looking at it, but the truth of the matter is that you just have to know where to look.
When you're buying your pigs from the market, you should choose healthy looking ones with clear eyes and shiny coats as these are great indicators of their health.
You should ask questions about how the pig was cared for. Ideally, pigs should be fed a nutritious diet of grains, including corn, wheat and barley. This type of diet will give your pigs a healthy coat and help them to gain weight in a healthy and steady way.