Depending on how many canes the plant has & container size would determine if dividing is required. The bigger the plant, the better it flowers, as a broad statement. I have a number of Catts & I prefer to back-cut the plant to get leads from the older section. I wait till the plant requires!!! repotting then I have ready made plants rather than waiting to have them establish again. Regardless ( in most cases), the more you leave them alone, the better they are. This can alter if you have "perfect" growing conditions.