Charlie is a clever boy indeed. I'm still learning just how smart Cockers are. Posie picks up some tricks but not others, then out of nowhere demonstrates an understanding of what I was unsuccessfully trying to teach her. They seem to prefer to work things out to their benefit rather than just immitate. I think this means they need "special" training methods.
We've started to teach Posie the "toys in the box" trick, but so far she has only figured out the "toys out of the box" part.
Her current obsession is hiding socks. Finding them on command is a different game altogether.