I absolutely love walking!!!! How far is it safe to walk my 12 month Rottie??? I want to bulk her up a little bit but do not want to exhaust her or put any stress on her joints. At the moment we walk 2 times 30-40 minutes a day. Hubby and I are planning 5 hour walks for our pleasure on the weekends. I definately think that is way too long for her and I will take her for a short walk when we get home.