Oh, yeah - where did the replacement Layla come in? She was there the next day when Dorie plucked her.
To that I don't have an answer. Others had suggested that the dog breeder be checked with to see if he had any late night dealings with Damon. I also would think that the boys would notice if it was a different 'LAYLA' ,but maybe not.
I wish I had the answer, and I am thinking about it.
It is, I believe, the only FLAW in this theory.
Ironic coincidence, the SEARCHERS at Dehesa Rd. did not find Danielle's body by the smell. They were attracted to the rotting carcass of a DOG that was nearby.