A reminder that you CAN market your Triffids as "free range" as long as they are not physically confined within a roofed structure, but you can NOT market them as "organic" if they're free-hunting within a city, unless you can provide a documentation chain certifying the 100% organic status of all humans they ate.
The Triffid Marketing Council understands that your Triffids may dislike organic dietary restrictions, but it's for their own good. And of course the health of the Triffid brand.