I've been told by folks who likely know to quote Lee West that he said to never get rid of a puppy if you possibly have the room to keep them. They change so much that one never knows when one will come on and the worst becomes the best. I've been told stories of this happening. I've had some early rejects become good dogs but never have I had one move from worst to first in their little group. I'm sure it happens though.
Glad you didn't sell those and later get beat by them! Good luck this spring. We are trialing on wild birds on the Z Bar in south central Kansas Dec 19-21 if you want to join us. See the Gyp Hills Field Trial club ad last Am Field.