Greyhound

Big on paper, but a retired racer spends most of the day asleep and is usually content with two short walks, which is why so many do well in flats with room for a large bed. Dogs from racing kennels are used to a fixed routine, and that often helps them settle while you are out, though stairs and shiny floors can be new to them. The real trade-off is prey drive: plenty need a muzzle around small pets and should stay on the lead outside fenced areas. Grooming is a weekly wipe-over; painful corns on the pads are the problem to watch.