The Deccan Development Society (DDS) has asked the Government to declare a moratorium on the cultivation of Bt hybrids until a comprehensive study is undertaken on the possible impact of Bt hybrids on environment, livestock and human health. In a statement, M. Abdul Qayuum and S. Kiran, DDS scientists, said the deleterious affects of Bt cotton on livestock have resurfaced in Warangal district. In Gammadavelli village, symptoms appeared more on the goats compared to sheep. Bloating of stomach, mucous flow from nostrils, reddish urination were some of the symptoms. Besides, some shepherds also had bloating of stomach and skin allergies in the neck region, the release said.