This research was funded by the Agencia Nacional de Promoción Científica y Técnica (ANPCyT), PICT-2010-1493 and PICT-2006-074 to LFC. PG-R was recipient of a post-doctoral fellowship from the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, Argentina). FB-C and EMT-C were recipients of 2007–83920 CONACyT and 2012 CIC-UMSNH grants. PG-R wrote the manuscript with assistance from EMT-C and LFC. PG-R was responsible for all aspects of the experimental design and feeding trial, with assistance from LFC in sample collection and results discussion. FB-C and EMT-C developed the analysis of enzyme activities. CM, JZ and MV formulated the experimental diets and developed the analysis of chemical composition. Authors read and approved the findings of the study. None of the authors had a conflict of interest.