Glucosamine Chondroitin For Dogs Side Effects. Glucosamine and chondroitin for dogs can be a great way to give them the additional support they need to keep their joints healthy. Some dogs can experience a few side effects, like diarrhea, vomiting, and gas, which can be avoided by giving the supplement along with food.
Because of that, their bones rub together, making it very uncomfortable for them to be active. One of the rarest potential side effects that occurs when a dog is given glucosamine is a negative impact on levels of blood sugar, as well as a potential increase in bleeding risk. These side effects are brief and should go away after several doses.