FWIW guys, we generally train for a full blown indication ( not to be confused with 'alert') on a gram or more, because ordinarily a gram is prosecutable in most jurisdictions.
As an aside, the terms 'alert' and 'indication' are used interchangeably, even by trainers. When it comes down to court testimony time, you need to tighten it up a bit. And 'alert' is anything the dog does that signifies he has come into the odor of contraband. ( head jerk, nose press, rapid sniff etc..)
And 'indication' or 'final response' is what the dog does to let you know he has located the source of the odor. ( sitting, scratching, whatever he has been trained)
A handler can describe in court a series of 'alerts' that let him know the dog is in the odor of contraband,before the dog 'indicates' the location of that contraband. If he has been dutifully keeping his training records, he can verify each type of 'alert' by quantifying them.
