CP and ocular melanoma: There was high positive correlation between NH3-N production and ADF (r = 0.81; p < 0.001), NFC (r = 0.76; p = 0.001), OM (r = 0.75; p = 0.001), DM (r = 0.74; p = 0.002), the ratio of non-fibrous carbohydrates to neutral detergent fibers (NFC/NDF) (r = 0.74; p = 0.002), NDF (r = 0.73; p = 0.002) and EE (r = 0.72; p = 0.003), but a moderate positive correlation with CP (r = 0.62; p = 0.013).