While individual dogs may vary, in general show-bred Labradors are heavier built, slightly shorter-bodied, and have a thicker coat and tail. Field Labradors are generally longer-legged, lighter, and more lithe in build, making them agile. In the head, show Labradors tend to have broader heads, better defined stops, and more powerful necks, while field Labradors have lighter and slightly narrower heads with longer muzzles. Field-bred Labradors are commonly higher energy and more high-strung compared to the Labrador bred for conformation showing while conformation breeds are calmer in energy, and as a consequence may be more suited to working relationships than being a "family pet". Some breeders, especially those specialising in the field type, feel that breed shows do not adequately recognise their type of dog, leading to occasional debate regarding officially splitting the breed into subtypes.
Labradors like to eat, and without proper exercise can become obese. Laziness is a contribution to this. Obesity is a serious condition and can be considered the number one nutritional problem with dogs. A study shows that at least 25% of dogs in the United States are overweight. Therefore, Labradors must be properly exercised and stimulated. A healthy Labrador can do swimming wind sprints for two hours, and should keep a very slight hourglass waist and be fit and light, rather than fat or heavy-set. Obesity can exacerbate conditions such as hip dysplasia and joint problems, and can lead to secondary diseases, including diabetes. Osteoarthritis is very common in older, especially overweight, Labradors. A 14-year study covering 48 dogs by food manufacturer Purina showed that Labradors fed to maintain a lean body shape outlived those fed freely by around two years, emphasising the importance of not over-feeding. Labradors should be walked twice a day for at least half an hour.
ZOO Supply, created by the designers of the celebrity-loved Z SUPPLY, recently launched matching fashion apparel for dogs. Their pet sweatshirts and jerseys are made from the same plush fabrics and prints as the Z SUPPLY collection for humans. Dogs living in colder climates will especially love the cozy breathable layers and owners will love that its machine washable.