A digestion and a growth trial was conducted, (i) to determine the effect of sodium hydroxide (NaOH) treatment of bird-proof sorghum (BPS) on nitrogen and energy digestibility, and (ii) to compare treated with untreated BPS as grain components in a pig growth diet. The polyphenol content of BPS was reduced from 1,33 to 0,01% by NaOH treatment. NaOH treatment increased dietary nitrogen digestibility highly significantly (P≤0,01) from 65,5% to 77,1%. Nitrogen retention was also increased from 12,0 to 14,7 g/day (P≤0,01). Apparent digestibility of energy was improved (P≤0,01) from 76,7% to 81,9% resulting in a highly significant (P≤0,01) increase in dietary DE content from 13,85 MJ/kg DM to 14,83. Pigs fed NaOH-treated grain had livemass gains 8% higher (P≤0,05) than pigs fed the untreated BPS-containing diet. Although DE utilization did not differ between treatments, pigs on the treated grain diet had a significantly (P≤0,05) better feed conversion ratio (3,31 vs 3,56 kg feed/kg gain).