Calm???
Other thing is , getting a pup, can you put in the time early on, as you can't leave a pup a lone in a flat all day, ir needs feeding an walks during the day a number of times, let alone the negative psychological aspect.
All I meant was, if space is an issue and he can give it enough exercise, a whippet would be calm around the flat. If he's working all day and leaving it indoors it doesn't make any different if it's a flat or a house surely? that's an entirely different issue. If he's working a normal working day, i.e. 9 to 5, and takes it for a decent long walk before and