Iris lilies, both my whiteness and my experience in eduction are showing.

I think you are visualizing an armed man in uniform with a German shepherd.

my school has a drug dog. It’s a small, friendly, herding breed. It belongs to a staff member. If we have concerns or a few times a year it comes in to visit. The children pet it and play with it and they don’t know it is a drug dog and now and then, somebody gets called down to the office and their backpack gets searched and their parents get called. Someone asked how to get the drugs out of the library. Clearly asking people not to bring drugs into the library won’t work. There is no non-confrontational way to get the drugs out of the library. At the very least, they have to be detected and stopped/removed.

I also wasn’t envisioning a drug dog harassing library patrons. I was envisioning a well trained dog walking quietly by in a much less obtrusive fashion than most animals I meet in pet smart.

lalso, I wanted to post signs about the drug dog so that anybody walking in who could read would have the option to leave and return NOT carrying drugs.

Now totally off topic, so I won’t try to elaborate further.