It is unclear what substance within these fruits is toxic to dogs. There are several theories: mycotoxin, salicylate, or tartaric acid (including tartrates like potassium bitartrate), are all naturally found in grapes and decrease blood flow to the kidneys.
Obesity in dogs can lead to serious health issues like arthritis, kidney disease, and respiratory problems, all which can shorten a dogs lifespan. Overfeeding, lack of exercise, and certain medical conditions such as hypothyroidism and Cushings disease are common causes of obesity.

Dog obesity is when your dog carries too much body fat, usually 10% above their ideal weight for overweight dogs and 20% or more for obese ones. Its not just about looking a bit bigger; its a medical condition that stresses their joints and heart and even shortens their life.

Sugar has long been considered by many to play a role in weight gain and obesity. The question of whether does sugar cause obesity, however, is a complex one with arguments on both sides. This discussion will look at both sides of the debate around sugar and obesity.