I have just retired my first x to a pet home with my daughter, was a good little ferreting dog, good nose,  great drive, decent on lamp but did lack a yard daytime, was a small bitch just over 18”, I put a whippet over her a few years back and they were better running dogs, I prefer the 3/4 bred whippet but a half bred greyhound would be better than half bred whippet in my personal opinion