collie curs or crosses are fine as long as you no there limit some throw colliesh wastage, some throw greyhondy no wind then you get the odd one thats a cracker , had more succsess when bred the greyound whipp in to them ,for just rabbiting and short dashes , at times ,one thing about collies if you can train a dog and he isnt nesh or timid theyll try there heart out but just not got the legs at times ,if not fit fit ,its good seeing old pics and for some thats all they have , left , ilke that traveler and swift