I need some advice. I have trained two labs and never had this problem. my new puppy was coming along fine. He is 20 weeks old and for the last 3 weeks when he goes to get a bumper he walks over picks it up and walks back sometimes he drops it or won't pick it up and bring it back. He acts bored, he knows what he is doing and it doesn't matter if it is the first throw or fourth. I don't work hom too much or very long. I am lost what do I do.