Actual pellet movements within the plastic casings were not constrained by the casing covers. There were 5 replicates per diet for each trial run which covered 5, 10, 20 and 30 min. The replicates for each of the diets were collectively placed in separate 1000 ml beakers containing 300 ml of tap water and placed on a shaker (IKA model HS260) set at 60 cycles per minute for each time period. At the end of each set time, the cassettes were recovered and allowed to drain off excess water on paper tissues. All the cassettes along with their residual contents were transferred into an oven and dried at 80 ◦C for 48 h. The dry samples were cooled in a desiccator and weighed to determine the residual dry matter. The water stability of the pellets of the different dietary groups was calculated as a ratio of the dry matter recovered after each trial run and the dry matter of the original samples and expressed as a percentage. The dry samples of each of the diets for each time period were then analyzed for protein and lipid to determine nutrient contents relative to retained dry matter over the different time periods using the following equation: