When the target is to achieve as near complete phytate elimination as possible through phytase superdosing, the action of xylanase in improving phytate availability would appear to offer even greater benefits. Providing the phytase used is optimised for superdosing – intrinsically thermostable without the need for coatings, high levels of activity in the stomach, able to degrade even low concentrations of phytate – the result should be an additional gain beyond the typical three to four point improvement in broiler feed conversion efficiency seen with phytase superdosing alone.