i have a year old light brahma roo. within the past week is crow has been getting alot soft, now there is no sound. i am thinking gapeworm or somethng stuck in his crop? he is eating and drinking fine. he is by himself now and i added b-12 to his water. is DE the best to dust and deworm all my birds? or do i need something different for gapeworm. thanks for all replies..........