With the price of phosphate driving up feed prices and the environmental concerns surrounding the use of phosphorus (P), it is beneficial to understand a birds response to dietary phosphorus in order to optimize its use. Due to the large volume of studies done on the bird response to dietary phosphorus, researchers were able to combine the results of multiple studies done between 1996 and 2006 to build a database of eight publications reporting 15 experiments, with a total of 203 treatments. This database was used to predict the birds response to dietary phosphate with the key variables being calcium (Ca) and microbial physate derived from Aspergillus niger, in terms of average daily feed intake (ADFI), average daily gain (ADG), gain to feed (G:F) and tibia ash concentration. The data was then put through a regression to find the implicaitons phosphorus had on ADG, ADFI, G:F, and tibia ash concentration. Dietary Ca affected the intercept and linear component for ADG, G:F and tibia ash concentration, whereas for ADFI, it affected only the intercept. The microbial physate additive effected the intercept, the linear coefficient and intercept coefficient for ADFI, ADG, and G:F. Microbial physate also effected the intercept and linear component for tibia ash concentration. An evaluation was then done on these models to test their performance. Results showed that ADFI, ADG and Tibia ash concentration were predicted fairly well (slope and intercept did not deviate from 0 to 1, respectively), whereas this was not the case for G:F. An increase in Ca had an aggravating affect on P deficiency for all criteria while additional physate had the opposite effect. It must be considered that even if the decrease in dietary Ca may improve P utilisation, it could in turn become limiting for bone mineralisation. In conclusion this meta-analysis provides options for reducing expensive and environmentally suspect P in diets without sacrificing growth, by manipulations of calcium and physate.