I've had several labs but the one I have now ( just turned 1 yr. ) has done something I have never seen. A week ago my son shot down a mallard and sent our lab after it. He exploded into the water went straight to it and brought it straight back. Since then-- he will not pick one up. He explodes in the water goes to it or finds it but won't pick it up. The last time I sent him he pushed the duck back to the bank. Anyone ever seen this and what causes the problem, and how to fix it. Any ideas.