The RSP design consisted of three dose levels, in which all the calves
were started on the same dose at the first design level, but thereafter
participated in the study based only on own obtained results. The grades
of negative reactions (milk detected in the rumen or failure to ingest the
offered amount) determine the dose for the subsequent levels. All calves
were given 4.0 l at thefirst RSP level, and the meal size was subsequently changed individually based on the obtained results, i.e. milk detected
in the rumen or failure to ingest the amount offered. The minimum and
maximum meal size were set to be 1.0 and 7.0 l, respectively.