Dogwalkers “Play” Big Dog pre-roll offers .75g of Sativa flower in a single format. Conveniently packaged in an on-the-go tube, each Big Dog is crafted with strain-specific premium flower; never shake, stems or seeds. Dogwalkers donates a portion of proceeds from every product sold to deserving animal shelters across the country. .75 Pre-Roll | Sativa | Indoor Grown Cannabis flower is the smokable, trichome-covered part of a female cannabis plant. Pre-rolls are cannabis joints that have been rolled ahead of time for you.