What is the ruling on eating chicken that is fed feed mixed with shed blood?

Shed blood is impure by scholarly consensus. If edible animals are fed impure feed made from shed blood, then such animals are considered "jallalah" (filthy animals) and are impermissible to eat according to many scholars, even if slaughtered Islamically, unless they are fed pure feed for a period sufficient to purify their meat. Chickens fed with shed blood are considered jallalah and are impermissible to eat.