There's been some good points mentioned here.
I've plenty o years o ownin, workin an bein rahnd bull x's.
I'd like to through consideration to eyes, ears an skin into the mix of attributes mentioned.. I had a great dog 'Striker' who after a days fox drivin on the 'fens' workin cover, findin an attendin to shot foxes, was asked by the farmer if we wanted to run a hare. The mantle was picked up as an oppertunity to run a fen hare was not to be missed. A good an more than fair slip(not by choice...more circumstance) a half dozen turns an bingo. Job done.
Bull x stamina, grit, ability to l