Abstract This study aims to evaluate the capability of extracellular protease hydrolyze keratin substrates local poultry feathers and observing amino acid profile. The indigenous strains ( Bacillus cereus TD5B, LS2B, Pseudomonas sp. PK4) were used in this study, obtained data analysed descriptively. TD5B has a maximum activity at 0.003849062 unit/ml 0.000310042 on casein commercial substrates. ...