I've read about how people can vacuum their bags but don't really know how to do this to the quality those on DNM's do, my packages came in silver vacuumed bags, I doubt even the dogs could smell it.
They also use anti dog spray to repel the dogs, but I still think there's a chance in them finding your stuff, what has been recommended before is to make a weed tea and spray the water all over your place to give false signals to the dogs, the dogs can probably tell what is stronger though, from what I've read it's next to impossible to hide it from police dogs.
How about moving your drugs up high so that dogs can't indicate that the drugs are for example up a tree or maybe even put down some kind of trap so that when the dog is digging it falls into the trap and is harmed, a bear trap lol, that'll teach the fucker for working with the police. ;)
In the holocaust they used to use cocaine(edit:if I remember correctly). When the dog would smell it, it would numb their scent nubs so they couldn't pick up on people hiding in the walls. But using drugs to fool drug dogs searching for drugs doesn't seem like a very good idea.