"Hmm." Mairi puts her hand to her chin thoughtfully, then snaps her fingers with an idea. "I got it. One sec."

With a quick gesture, she casts Druidcraft, creating an illusory sound. Specifically, the sound of a cricket. Wild boars eat insects, and it can be hard to find them this time of year, so perhaps the one closest to the edge of the group will take an interest...