
What do you do when she picks up a sock? I ask this because, if you chase her and make a fuss to get it back, you are turning it into a game, and she has learned a good way of getting attention! You are showing her that a sock is a valued commodity, and something that she needs to hang on to! You need to turn the idea on its head, and teach her that
giving you the sock is the game. She's a working cocker, so she will have the instincts for this. How good is she at retrieving balls etc, and giving them to hand, just as a good gundog should? A good gundog trainer (such as John on this board) will be able to give you tips as to how this is best done.
In the meantime, make sure no socks are left lying around! Dogs are very good at teaching us humans how to be tidy!
:)