I’ve taught a few puppies from age 3-months to walk with me on a loose leash as well as focus/sit/stay/come and fetch. I’ve used training with other dogs to successfully mitigate the leash-pulling of a bulldog and a 90 lb. hound mix. The bulldog is learning to sit and focus on me if he wants to smell/pee on a telephone pole/tree/corner instead of just pulling at the leash. The hound is learning to sit and focus if he wants to chase squirrels to a tree.  The hound is also dog reactive so I’ve worked to desensitize him and started to build a positive association for him with other dogs. Both of them have made incredible progress. My walks are tailored to fit each animal. If your pet is older and slow then the walks will be patient and leisurely to accommodate their aging joints. Some dogs like to sniff every single tree/stone/corner on the block. Puppies and dogs with lots of energy to burn will have a fast paced walk, with an occasional short sprint thrown in here or there to allow them to use up some of that energy. I also offer a fetch session for animals that benefit from even more exercise. I’ve taught a couple dogs to fetch. The instinct to chase comes naturally to most dogs. I use a 50-foot lead for these types of activities and avoid letting dogs off leash unless we’re in a fenced dog park or other fenced area. I use treats during my walks to teach and train the dogs to sit and walk with me. This can prevent pulling on the leash. I also use treats for behavior modification such as teaching them not to bark at other dogs or people.