After some research it has come to light that certain large beans may cause toxicities when fed raw.These beans are, Lima,kidney,soy,black,navy, pinto,anasazi,& fava.They have the potential to cause digestive upset.It is recommended that they are cooked to make them digestible for your grey.Another suggestion is to soak them for 24 hours.Personally when i soak a bean mixture i soak overnight for 10 hours, rinsing thoroughly before feeding them to my greys.
Certain uncooked beans contain an enzyme inhibitor which may lead to visceral gout in birds.These beans are lima,kidney & soy.Cooking these beans destroys the enzyme inhibitor.