I agree that they have great noses on them, (never seen a proper one who hasn't)
My 8 month pup never fails to amaze me, rats,rabbits, pheasants,deer, - he always seems to know when they are in his vicinity.
Went for a mooch this morning, he marked a stoat/weasel under a tree in the roots (it bolted after a bit of digging.) Then I found him standing stock still,one foot up in the air like a mini pointer, staring at a dry stone wall,after a bit of moving stones and fishing around inside I pulled ot a large rabbit which he's having for his tea tonight.