Hi, welcome to the forum. Glad you joined. You may have noticed this is a very old thread.
Chickens have been free ranging and feeding themselves on what they find for thousands of years, long before they were domesticated. They did not die and go extinct from these poisons.
One reason...
A lot of things are toxic to chickens, humans too for that matter, but dosage plays a huge role. Tomato leaves contain a toxin that in certain quantities can cause serious problems but one bite won’t kill you or a chicken. The leaves taste pretty bitter so what normally happens is that a...