[Use of "fermosin" fodder yeast in a multi-generation experiment with chickens. 1. The rearing period]

The use of 5%, 7.5% and 15% 'fermosinR' torula yeast as a reference protein for soybean oilmeal and fishmeal was tested under toxicologic aspects in a multi-generation experiment over 3 generations with small chickens and young hens of the species White Leghorn at the ages of between 5 and 147 days. Only with a quota of 15% 'fermosinR' was the feed and energy consumption of the young animals diminished. Crude protein and amino acid consumption increased with the growing concentration in the mixed feed. For the parameters live weight development and mortality of the young hens no significant relation to the arrangement of the experiment could be proved. The results show that the feeding of 'fermosinR' torula yeast to small chickens and young hens is basically possible. The clinical status ascertained, the results of biochemical investigations and the findings of pathomorphology from the reared animals respectively those died during the experiment are to be reported on.