Wilco X Purina Checkerboard Days Event FLYER Wilco’s annual Checkerboard Days is a co-branded event with Purina that takes place each September. The event features an 8 page full-color flyer that is categorized by species. Billboard The theme chosen for the Checkerboard Days Event was “Feed the Farm”. The tagline can be seen across all collateral pieces. Pandora The campaign also featured Pandora ads with the “Feed the Farm” tagline.