I personally have a little Pomeranian chihuahua who is Over 3 years old , and have had him since 4 weeks. I walk him 2-3 times a day, and would love to add other dogs on the walk, or can take them separately (as desired). I walk 5-7 miles a day, so I like to stay as active as possible. I am an avid hiker, and also go on trail walks daily. I think that pet exercise is extremely important for animals, because it is healthy and helps them Sleep better at night. I will walk any sized dog, as long as they are trained to walk on a leash. I look forward to walking your pet, and getting them into shape, or maintaining their health.