I have a puppy which I'm supposed to walk twice a day for 20 minutes. This is the official guidance (5 mins per month of age, twice a day).
I'm worried about taking her for one long walk, as it might affect her hips in the long run (she's a Labrador, so prone to displasia). If I only take her for one short walk she'll destroy my house and likely put on weight.
What are others doing in this situation?