I will be free ranging my Scovies later this spring and summer and we have a lot of different grasses & weeds that produce seed. I expect my Scovies will be eating them. I've seen them strip bark from the branches of white pine. I give them cracked corn mixed with a nice bird seed that has millet, BOSS, and some safflower mixed w/mash twice a day as a snack, well if the chooks don't eat it all first
, as well as some greens and bits of fruit in their water bowl. They also have pellet/mash available free choice which they just love.
I've seen them eating out of a bowl of sand and small gravel for grit so it looks to me that they know what they need to process the food they eat.

