The mudy waa conducted at San Miguel, Maygalang, Pampanga for $6 days A two-factor factorial experiment in Randomized Complete Block Design (RCRD) waa used in the study Factor A were the brands of probiotics while Factor B wore the levela of probiotics A total of three hundred six (306) Japanese Seattle Quasis wore used as exponmental animals in the study. Findings showed that supplementation of liquid probiotics in drinking water of the birds significantly affect the laying performance of Japanese Seattle Quailis in terms of egg production, hen-housed production, hen-day production, egg weight, feed conversion ratio and feed consumption. The highest net income was recorded from those birds given with 2m! YSP gutwell while the lowest net income was recorded from those birds under AIBI, Results indicate that the type and levels of liquid probiotics in the drinking water significantly influenced the laying performance of the birds.