Cat breeding systems are closed to limit the area that fed the cats like pet cages pet only home condo or dorm parties where there is a fence around the edges. Because the owner may not raise the system open. Cats protection lost.
Cat closed system is to limit the area like a caged pet cats in boarding houses, condos or cultured in the presence gated. Because the owner could not easily access the OS. Missing Cats Protection And prevent the disease from outside.
A pet cat system is the limited space cat like caged, raised only in the home, dormitory, condo or raised in the fence around the edges aligned Because the owner may not raise open system, prevent the cat lost