EM is being used widely for agriculture. It is safe to use because it is from nature. It is a combination of beneficial microorganism. It speeds up decomposition for garbage. It is used as deodorizer since it kills harmful microorg. Hence it will remove the foul smell in your aviary or trash bin. The one you saw is EM3 i think, it incorporates chicken dung and later on fermented with EM1. EM1 is EM plus Sugar fermented for 7 days. Bokashi is EM2. EM can be added to the water your birds are drinking even bath. It serves as enzyme and clean up the intestines and system of your birds and boosting immune system naturally.