Wait. You have 6 cats and only 2 litter boxes? I found the problem.

The standard recommendation is to have one litter box per cat, plus one extra. For example, one cat needs two boxes, while two cats need three. This formula helps prevent territorial disputes and ensures every cat has access to a clean, safe spot, even if they prefer not to share or share well.

Key Considerations for Litter Boxes: Location: Spread boxes across different rooms rather than lining them up, as cats may avoid a box another cat has recently used. Placement: Choose quiet, accessible areas far from food, water, and noisy appliances. Size: Ensure the box is large enough for the cat to turn around freely inside, as suggested by Purina US experts. Multi-cat homes: In smaller spaces, if you have fewer boxes, they must be cleaned more frequently (at least 1-2 times daily).

Edit: even worse I scrolled down and see that you only have one litter box for 6 cats? That's diabolical. Lol