While genetics plays a role in determining whether or not you dog will become obese, you still have control over whether or not he will stay healthy. To help your dog remain at his proper weight, you will need to take certain steps to ensure that he eats properly and gets plenty of exercise. First, start by making sure that your dog receives his daily dose of vitamins, minerals, and supplements. Your vet can recommend the right products for your dog based on his age, health status, and lifestyle. Next, you'll need to change his diet. Feeding your dog a high calorie diet full of processed foods like dry kibble is never a good idea. Instead, you should provide your dog with a natural, balanced diet consisting of fresh vegetables, fruits, and lean meats. You should also limit your dog's access to junk food. Keep all treats hidden away so your dog doesn't eat them while you aren't looking. Finally, it's important to encourage your dog to get regular exercise. A walk around the block will certainly help, but you should also consider enrolling your dog in a fitness program designed specifically for Labs. For example, you can find a local gym near you that offers classes for dogs like agility training and obedience training.