"Tales" sounds about right . . .
Bricks, yeah, there are some obvious ones: broken glass, blasting caps, rat poison, etc. Look, do any of us have any doubts that chickens may well eat some of this stuff??
I like to use this source on plants toxic to humans. And, keep in mind that just because they are 
toxic doesn't mean that they are 
lethal. It's probably best to limit 
all poisons going into me or my birds, just as a personal rule of thumb 
.
What the UCDavis folks say is, "If a plant is known to be hazardous to humans, it will probably be toxic for animals as well." And, I like to click the link at the bottom of the page sometimes just to look at things that are 
not toxic 
.
http://www.plantsciences.ucdavis.edu/ce/king/PoisPlant/Tox-COM.htm
Steve's digitS'
edited to add the "personal"