You know that saying about birds of a feather?
Invading the Boise area, a certain type of chain definitely is flocking together.
Birdcall, an expanding, fast-casual chicken brand from Denver, has inked a deal to enter the Treasure Valley. Caleb Randall, owner of local Guru Donuts, has signed a franchise agreement to develop five restaurants, according to a press release. Guru Donuts operates at 928 W. Main St. in Boise. Its Eagle store closed earlier this year…