Caprines were used in a change-over design to evaluate dry matter (DM) and crude protein (CP) degradability of the following byproducts: soybean meal 1 (SM1), heat-processed soybean (HPS), cotton seed meal (CSM), meat and bone meal 1 (MBM1), meat and bone meal 2 (MBM 2), soybean meal 2 (SM2), fish meal (FM), babasu meal (BM), blood meal (BLM) and chicken viscera meal (CVM) through in situ nylon bag technique. Napier grass (Pennisetum purpureum Schum) was fed as the only roughage. Effective degradability of CP was 68.47% (SM1), 65.60% (SM2), 60.71% (CSM), 65.69% (HPM), 61.59% (MBM1) and 62.58% (MBM2), while effective degradability of DM was 75.48% (SM1), 73.05% (SM2), 52.39% (CSM), 70.38% (HPM), 44.45% (MBM1), 47.01% (MBM2), 48.43% (FM), 38% (BM), and 53.82% (CVM), considering 0.05/h turnover (r). | Caprinos foram utilizados num delineamento change-over 2 (5 x 5) para estudar a degradabilidade da matéria seca e proteína bruta dos subprodutos: farelo de soja¹ (FS1), soja integral tostada (SIT), farelo de algodão (FA), farinha de carne e ossos 1 (FCO1), farinha de carne e ossos 2 (FCO 2), farelo de soja 2 (FS2), farinha de peixe (FP), torta de babaçu (TB), farinha de sangue (FSA) e farinha de vísceras de frango (FVF), pela técnica dos sacos de náilon in situ. O capim napier foi o único volumoso. A degradabilidade efetiva da PB foi de 68,47% para o FS1; 65,60% para o FS2; 60,71% para o FA; 65,69% para a SIT; 61,59% para a FCO1; e 62,58% para a FCO2, enquanto a degradabilidade efetiva da MS foi 75,48% para o FS1; 73,05% para o FS2; 52,39% para o FA; 70,38% para a SIT; 44,45% para a FCO1; 47,01% para a FCO2; 48,43% para a FP; 38% para a TB; e 53,82% para FVF, com r de 0,05/h.