@Nougat
@fedia.ioHence the quotes around "alert." I chose to keep my previous comment about accurate dog sniffs in order to address the question of "police dogs that react to weed even though the smell of weed is not illegal." Inaccurate sniffs are a completely valid, but separate concern.
These should all be burned into everyone's brain (even if some shitheads have made "Am I being detained?" into a joke, it is still valid).
With regard to refusing to answer questions and searches:
If the police want to talk to you, it's Shut the Fuck Up Day.
Shit I thought that became the case when Illinois passed its recreational law.
Will police have to retire police dogs if they still react to weed?
Yes. Police dogs "alerting" on something that isn't illegal, in a way that is indistinguishable from "alerting" on something that is illegal, are no longer qualified to be drug sniffers.