Performance and wool growth in lambs fed rations containing formaldehyde treated protein

Thirty two 3 months old Polish Lowland wethers of about 20 kg initial body weight were divided into four equal groups. Wethers in each group were fed individually for 78 days with diets consisting of dried sugar beet pulp and meadow hay supplemented with untreated or formaldehyde-treated casein and untreated or formaldehyde-treated rapaseed oil meal. All diets contained about 20% crude fibre and 17% crude protein (DM basis), about 50% of that protein was derived from casein or rapeseed oil meal.