I love old dogs but i'm still able to keep up with the little pups. I've dog sat for a few friends and honestly I love taking care of them. I'm pretty active so going for walks is no big deal. I'm good with small and medium dogs. I usually feed the dogs whenever I eat but I follow instructions really well. I love to play ball or tug of war with dogs, I know a lot of people don't have the patience, but dogs are just like kids they need love and attention. I also know they need discipline like children, so I have no problem setting restrictions given by the owner. I will also keep you updated on the activity of your dog(s).