I'm trying to train my dog to fetch and I've read various posts and sites that suggested giving treats when they nose at a toy and then pick it up. Eventually having them pick it up and bring it to you. I've been trying this to no avail and my dog is not interested in any toys or balls. He will watch them if I kick or throw them but that's the end of his interest. He won't follow them or even look at them if they aren't moving. Any suggestions?