Abstract
The performance and digestibility of lambs fed diets with two different concentrate: roughage ratio with or without live yeast (Saccharomyces cerevisiae) will be evaluated. Lambs will be fed with two different roughage:concentrate ratio (20:80 e 40:60), with or without live yeast. The performance trial will utilize 24 males lambs averaging 80 days old, kept in individual pens for 60 days …