consider the age of your old dog

Our veterinarian will consider your dog's age, breed and size beyond its muscle tone, flexibility and cardiovascular endurance, as suggested by the proper exercise program. Most of the walks are likely to be included in your daily routine.
Considerations when you leave an old dog
Peace is a significant factor. Do not expect Fido to go at the pace he used to. Think of it as more of a walk you two have fun together.
Water down the road. Just as joggers enjoy a bottle of water halfway through their course, carry a water bottle for your dog. Pour slowly, and he will be able to ride like a fountain. Many pet stores carry a product that is a bottle and bowl in one. Or wear a small bowl, folding with you and take a break halfway through your turn to water.
Timing. Walk your dog before a meal, not after. This will minimize the risk of inflation. Bloat is caused when a dog's stomach fills with air and can cause twisting of the stomach that traps air and can cause a dog to die.
Surface. When pups are young, it is proposed that they walk on a hard surface like a road to help burdening their nails. However, the opposite is true when you go to an old dog. You want to move your old friend on soft grass or dirt to avoid damage to its findings. And if the surface is smooth for some reason, an old dog is nervous and maybe even drop.
Use a leash. Even if your dog does well off leash, you still want to use a leash when walking an old dog. If something catches one's eye your old friend, he may forget his age and go hunting for it. The older your dog is the greater the risk that this will lead to stretching or joint damage, which means, of course, the longer recovery time due to age. Do not take the chance. Use a leash.