I run three, because that's what I have. I don't think they all necessarily have to be top stock to make a decent bunch of rabbit dogs, others can learn as long as they have a halfway decent nose.
I say that because one of my three has a questionable background - bought him (cheap) for my Dad because he wanted a little dog after his 11 year-old rat terrier died, then Dad got sick and asked me to take the little dog in. He has the body of a beagle, but his head looks more like a collie or something.
He runs rabbits though.
I have done fine with one, and I have done fine with three. It's ALL good, get out there and see what you prefer.
:chug: