Small dogs have very distinct physiological traits such as jaw size, bone structure, digestive systems and high energy requirements, which can benefit from specialised nutrition. The effect of your small dog’s small jaw, means their teeth are spaced closer together than the teeth of larger dog breeds. This causes bacteria and small pieces of food to accumulate between the teeth. It forms layers from where tartar develops. An added risk factor is the weaker lower jaw of the smaller breeds that can be damaged, should serious dental illness occur. Small dogs might also have sensitive skin, overreacting to pollen and pollution in the air. Changing food may upset the sensitive digestive system of small dogs and may cause soft stool or flatulence. 30 – 40% of small dogs are overweight. Excess weight is detrimental to health and may even shorten life expectancy.