The aim of this resarch is to determine the potential of   rumen  content of cattle from slaughterhouse as ruminants   feed in Manokwari District, judging   from quantity (fresh and dry weight), Quality (DM and OM content), and physical characteristics.  Data of research analyzed by tabulation and T-Test. The results showed that each cow that is cut produces an average rumen content  of 8.507, 88 g  fresh weight or 1.127,16 g  dry weight with DM content 89,14%   and  OM content 89,83%. The average daily cattle slaughter of 5 tails, so that the contents of the rumen generated as much as 10.595,8 g (10,596 kg) fresh weight or 5.635,8 g (5,636 kg)  dry weight with 5,024 kg  DM and 4,513 kg OM availability.  Characteristics of the rumen content after drying is  yellowishbrown ,  texture varies smooth to coarse and aromatic typical of rumen or dried grass.