i have i show bred one that was the same she was 18months when i got her with no desire to retrive but shes is now a great working dog, go back to treating her like a pup wind her up a bit get a pup dummy or old socks(something light) and whizz about on the ground in front of her then throw it a few metres away and lets her run in, mine use to drop the dummy if i looked at her, so try straring at the ground as she comes back, only praise her when she picks the retrive as its all about timing, she will thinks what she is doing is right. good luck. jealousy also worked with mine just getting her
