My dog is gaining weight or not losing weight, even with a special diet or less food, how is this possible?

When your dog, despite dieting, is not losing weight or even gaining weight, it is important to check if your dog can overeat. Is it possible that your dog is eating more somewhere else (i.e. a dog that is outside a lot). Is clear who of the owners feeds your dog? Is it possible that multiple owners feed your dog, without knowing? Making rules and clear agreements is very important. Another common mistake is that the daily recommended amount is seen as a portion and is fed multiple times a day.