Hi, I'm after a little advice. I have a 14 week old border collie/dalmatian pup. As you can guess she has alot of energy. I have been taking her out for pavement walk for 20 mins in the morning and across to the park 5 mins on lead and then off the lead in the park 20 mins in the afternoon. If a dog approaches, I recall her and put her back on the lead as she is a little wary of other dogs and is likely to run. So she has a little lead work in the park as well. My question is given her breed do you think it would be sensible to walk her for longer periods as she is still very bouncy when we get home? Or do you think it will give her joint problems later in life? Thank you for your advice.