Short answer

No, it is better for a kitten and a senior cat not to share the same litter tray. The rule of thumb is: one tray per cat, plus one extra. With two cats, that means three trays. This prevents territorial tension, soiling, and stress – particularly for the senior cat, who is more sensitive to hygiene issues.

• ✓Rule of thumb: n+1 litter trays (with 2 cats: 3 trays)
• ✓Trays in separate locations, at least 5 metres apart
• ✓Senior tray: low entry and extra cleaning
• ✓Self-cleaning litter tray significantly reduces cleaning tasks