I have some nice pups on at minute , smithfield tumbler type put to greyhound, saluki, whippet /deerhound, greyhound. these will make an excellent dog for what you require. should make around 24 - 26". I do same work wi my own dogs as what you are wanting to do ( after the ban ) . I am keeping one of the pups myself.
barni
whats a smithfield tumbler, made up of?
get a collie /whippet cross bullx