The commercial diet Guabi EXT 35 (Table 1) was previously ground and sieved (500 μm) to prepare seven diets, including 2% additions of each salt of organic acid and a control diet without a feed additive. The samples were homogenized in a Y mixer for 15 min, and 2% carboxymethylcellulose (CMC, Synth, Brazil) was added as binder. Once homogenized, 40%
water was added, the pelletizing process was carried out through a meat grinder, and the experimental diets were dried for 18 h at 40 °C.