I am an avid dog lover, I personally have two dogs of my own and can never get enough of them! I have stayed overnight with multiple dogs before and make sure they go out as often as I can. Walks will usually be about 30-45 minutes. I love taking them to the park, upon approval of course. I am comfortable with senior dogs as well as puppies. As for puppies, I have trained all the dogs in my household so I would be more than happy to carry on training while you are away or during the day. I personally have a cockapoo who is now 10 and an Australian shepherd who is 4. They are both full of energy and constantly want to play, so an active dog is definitely no problem. Hopefully I can help you out with your furry friends!