and walking outside can cause me to get crushed by a treeEarthworms can give chickens "gape worms". They can cause a chicken to suffocate due to the worms that block their airways. Just a warning.

my thoughts are this. Chickens naturally eat earthworms, frogs, snakes, grubs, bugs, larvae etc. They don't naturally eat bagged processed food. My chickens eat everything I listed and more on a daily basis and I've never had to worm chickens.
just my .02. Well .005 in this economy
