What are they like? I've had a rescue lurcher who was the perfect dog but must have been about 8 when I got her and my parents have a whippet (who was a awful pup) but I've never seen any lurcher pups. The one I'm looking at is a saluki/grey X whippet and I have a small 9 month old mutt already. He's happy with a half hour walk most days and lots a play/training plus 2-3 hour walks 2/3 days a week. Would this be enough for this kind of cross?