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Slaughterhouse waste can cause environmental problems. One of them is the contents of cows rumen which is generally thrown away without being utilized. The contents of the cows rumen contain a lot of enzymes besides that it contains a number of potential bacteria as bioactivators in the process of making goat feces fertilizer. The aim of this study was to evaluate the quality of goat feces fertilizer which was fed to the rumen of cattle. The materials used are goat feces and cow rumen contents. The research method uses a completely randomized design (CRD) experiment. The percentage treatment of cows rumen contents is different, namely 0%, 5%, 10% and 15%. The parameters measured: levels of N, P, K, organic C, C / N and water content. The results showed that the addition of rumen content in the manufacture of goat feces fertilizer had a very significant effect (P <0.01) on organic C content, Phosphorus, Nitrogen and C / N values, but did not affect (P> 0.05) potassium value and water content. The results obtained by the addition of 15% rumen content in the manufacture of goat feces fertilizer will provide 41.19% organic C levels, Phosphorus 0.15%, 1.59% Nitrogen, and C / N values of 25.05%. The quality of goat feces fertilizer produced has fulfilled SNI 19-7030-2004. Conclusion that the provision of rumen contents can increase the P, Nitrogen, C organic content and reduce the C / N value in the manufacture of our feces fertilizer