A catalytic cracking process is described wherein the cracking takes place in a reactor under the influence of a rotating fluidized bed catalyst and compressed gases andor steam is injected in order to effect movement of the catalyst bed. The pet feeding system and storage compartment generally includes a base unit including a compartment, wherein the compartment extends within the base unit, a cover unit movably attached to the base unit, wherein the cover unit includes an open position and a closed position with respect to the compartment of the base unit and at least one container secured to the cover unit. is spread on top of said film of hot water; d) a layer of gravel c) is spread on top of all of the above. The sleeve has perforations in a wall thereof. For example, the integral member can include a clamp or tab. The initial content of the mixing chamber is diverted from the discharge opening, and the subsequent content of the mixing chamber is extrudable from the discharge opening.