She still only tiny at 15 weeks old so she has 30-45 min walk during the day and then a 20 min walk before bed. The walk in the day wears her out and she sleeps for ages after that! Do you think this enough/not enough exercise for her, she gets played with during the day too. I know I will judge it by her week by week but when is it usual for puppies to be able to go for longer more challenging walks? My family and I took her through Abbots wood yesterday which was lovely and a hour long walk, she walked this ok but dragged behind for a while (think this was more because of all the smells than being tired).