Thanks for your reply. Interesting. I've met only a few greyhounds but one did need to burn off energy by running around in circles in the yard. It looked like a race track after awhile as the dog wore the lawn down to a beaten path.Friend's whippet (small greyhound) is also calm indoors but needs to be taken out everyday. Flashes across the yard like noone's business. It is the same with english pointers. Very calm if they get daily exercise but develop strange exercising habits if not. I once saw one that was kept kenneled and the dog would pace from one end to the other for hours. A large part of the day was spent pacing. I felt really bad for the dog.

So, as to greyhounds; the question would be: Will it still remain calm if kept indoors for a long period of time? Let's say a month.