We might be getting too far in time from the date of death for the cadaver dogs to have anything to hit on, if the body isn't there. This might make a difference in whether or not the hits at the Anthony house really indicate the body was there. I found this article
http://www.slate.com/id/2174177/
saying that cadaver dogs' accuracy goes down with an elapse of weeks or months. One "expert" made a comment in conjunction with the McCann case that, "...certain dogs were accurate just 22 percent to 38 percent of the time." Obviously the success rate of each dog is documented and if the dogs used in this case are highly accurate it will matter.
Just thought I would throw that out there. It is an interesting piece of information. And if Casey never talks and she is tried for murder this will certainly come up in court.