This issue, guest edited by Kathryn Michel and Amy Farcas, focuses on Small Animal Obesity. Article topics include: Scope of the Problem/Perception by Owners/Vets; Physiology; New Areas of Research; Metabolic Effects of Obesity/Interaction with Endocrine Diseases; Impact on Cardio/Respiratory Disease; Impact on Ortho/Neuro Disease; Nutritional Assessment; Treatment-diet; Treatment- Environment/Behavior Modification; and more!