I have been trying to teach Thor how to do a directed retrieve, and failing. I was diligent with him not chewing on or carrying around something that wasn't "his" and now he doesn't seem to want to pick up anything that he doesn't think is his. I am trying to teach him to bring me a phone as a task, and he just plain old won't do it. I have tried clicking and treating for touching it, but he won't go beyond that. Should I wrap it in something to make it more appealing? Anybody have any suggestions on this?