Forgot to add that boiled noodles added in a meal every other day will help with the carbs, and help them maintain energy, in return have excess energy which in return will lead to excess weight.
Dogs don't have the same digestive system we do. Noodles and pastas will not have the same nutritional value to them because their digestive track is not designed for breaking down and use this type of complex carbohydrates. They make use of simple carbohydrates though. What we know about our own digestive systems does not closely mimic that of dogs and thus lots of things like this are done with really good intentions but have little nutritional value to a dog.