... feather), and moreover prevent diseases. It is especially indispensable to the growth, fat synthetize and catabolism of poultry, livestock and ... or loss of hair or feather, scabby crusts appear round the corner of the eyes; disorder of digestion, loss of appetite, diarrhea; ... affected areas such as the corners of the month or beak, around the eyes, behind the ears and occasionally on the feet. Also a ...