You could end up with one like this
or you could end up with one who is perpetually diving in various different shades of animal excrement, mine has done it 3 times in the last fortnight, I think the last one may even have been human *boke*.
Time is the biggest trade off though, maybe not so much with the Greyhounds as recommended above but many other breeds/types whatever you’ll need to walk them at least a couple of hours per day.