Having read the "Who is the best marking dog you've ever seen?" thread-two questions:
Did they need to be challenged day in & day out throughout their lives during training or were they so naturally gifted that, after getting the gist of it down-they could rise to the occasion with very little "maintenance"?
Secondly-how many of the great dogs were equally talented when it came to blinds or did their marks carry them when their blinds could have used improvement? Or-were they great because they were the whole package-great markers and amazing at blinds too?