I get meself something around the 22/23 tts, Beddy/Gh/Wh type's or a Collie/Gh/Wh type something like that or even a straight working Whippet,
And for the ground you have too work on id be going for a dog with early pace and good agility and maybe a lighter framed dog, Cause we all know what rabbits are like on short grass, Pure Rockets
Atb fellah