Typical Soyex feeding rates are 2-3kg (4.5-6.5lbs) per cow per day. Since there's energy remaining in Soyex,( 500g (1lb) of oil), it makes for an excellent feed in high producing dry cow rations.

If you are feeding free or liquid oil, amount fed should be limited to 225g (.5lb) per cow per day. Unsaturated fatty acids can depress fiber digestion and rumen fermentation.

Here are some recommended feeding rates of soybean feed ingredients for comparison:

Answer adapted from University of Illinois Extenstion. 'Feeding Soyean as an Economic Alternative.' Authors: Mike Hutjens, Extension Dairy Specialist, University of Illinois, Urbana.