Danilova et al. (1999) performed electrophysiological studies in pig tongue reporting high neuronal responses to carbohydrate sweeteners such as fructose, sucrose or lactose among other mono and oligosaccharides. In preference trials sucrose showed the highest intensity of all the carbohydrates tested and their responses were very similar to sugar sensory tests in humans (Glasser et al., 2000). On the other hand pigs did not respond to human equivalent doses of HIS such as NHDC, THA, or SAC (Table 1) and the HIS combinations widely used in pig feeding such as SAC with NHDC and/or THA did not give any better response either.