Fig. 2

Cumulative sum control chart for feed conversion ratio. Calibration data included the feed conversion ratio data from all batches of pigs produced in all the farms enrolled in the study with isoquinoline alkaloids supplementation (during isoquinoline alkaloid supplementation). New data include feed conversion ratio from all batches of pigs produced after isoquinoline alkaloids supplementation. Red dots represent values outside the set limits and indicate a significant shift in feed conversion ratio