My ridgeback puppy is coming up to 9 months, I was wondering if other ridgeback owners could give some info on roughly how much exercise/activity their dog was getting at around this age? The more I read about hip dysplasia the more I worry about over-doing it on walks. We walk between 1-1.5 hrs on sandy/grassy ground, taking breaks to sit down along the way, does this sound appropriate? I've asked about this in another thread recently, but I'd be interested to hear from other ridgeback owners. Finally, any ridgeback owners on here whose dog has suffered from hip dysplasia? How old was the dog at the time?