Thanks for replys.
It only occurred to me because I have been toying with the idea of having a litter out if my JRT. I have always liked the sound of a whirrier.
My bitch is an outstanding busher, has a great nose, prey drive through the roof. Her only downside (for me) is that she goes to ground and is mental if you know what I'm saying.
If I could get her attributes in a larger dog that wouldn't fit to ground then I would be very happy indeed. I thought about putting beddy over her but I know beddys can still fit down earths.
So I thought maybe putting a small whippet over he