you will find that all mail to the US from Amsterdam is given the once over.

i doubt if it comes down to k9 units - there would be very little or no scent in a seed.

US customs also aware of the packaging used by different seed companies and target them- that's why after they change they're packaging everyone gets their seeds for a period of time - until they become aware of the change.

best to order from uk - same seeds but through a middleman. Dr Chronic is very good.