So there's really been no telling what genes might power the unique behavioral and physiological traits of the creatures. (washingtonpost.com)
Small dogs have very distinct physiological traits such as jaw size, bone structure, digestive systems, and high energy requirements which can benefit from specialized nutrition. (royalcanin.com)
Very small dogs have unique physiological traits, such as jaw size, bone strength and sensitive digestive systems, which can benefit from specialized nutrition. (royalcanin.com)