• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources cider press projects digital market permies.com pie forums private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Anne Miller
  • jordan barton
  • Pearl Sutton
  • Steve Thorn
  • Leigh Tate
  • r ranson
  • paul wheaton
stewards:
  • Nicole Alderman
  • Greg Martin
  • Mike Haasl
master gardeners:
  • John F Dean
gardeners:
  • Carla Burke
  • Jay Angler
  • Nancy Reading

gullets as attritor mills

 
pollinator
Posts: 2103
Location: Oakland, CA
9
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I have read that ducks love to pick spent birdshot off the bottom of their habitat, and the incessant rubbing of stones against the shot in their gullet gives these ducks lead poisoning.

Mollison's Design Manual doesn't mention this mineral milling action as one of the outputs of a chicken, but I wonder if it could be useful.  Particularly, I wonder if mixing appropriately-sized charcoal pieces into a bird's grit would be worthwhile, and what effect it might have on the bird.  I also imagine supplying grit of two different hardnesses, the softer one containing trace minerals needed by the bird and/or the soil, might be a less-laborious method of producing rock flour.

Any thoughts?
 
Posts: 2603
55
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I think however the minerals are provided to the animals they will end up one way or the other back into the soil, especially if you bury the eventual carcass. I wonder if chickens would be choosy if you offered them a variety of grit?
 
Evildoers! Eat my justice! And this tiny ad's justice too!
Rocket Mass Heater Manual - now free for a while
https://permies.com/goodies/8/rmhman
reply
    Bookmark Topic Watch Topic
  • New Topic