My dog used to be slightly too overweight but we did stopped her bad feeding before it was too late. Overweight on dogs (especially smaller ones) can be really bad for their health in a long run and it should be really taken in consideration to be taken care of. Their joints will start to hurt and it will make dogs suffer. You can always just start measuring really carefully the food and stop feeding your dog any extra snacks. Longer walks will also do a lot, especially if you have a smaller dog. Try to keep your dog as active as you can and it will not even realize you're feeding him less food than normally, haha!
