Hello 🙂 I have three cats who are mostly indoor but have access to the garden during the day (with protective fencing) but they won’t go to the toilet outside, instead saving it up and destroying the litter trays when they come indoors (they won’t use the cat flap, all three are quite stupid precious!), not sure if it’s because the garden is paved rather than grass. They also won’t use a lidded outdoor tray for the same reason, as they don’t like the flap!
Would a normal tray filled with fine gravel work as an outdoor tray, and I could just scoop poo/drain wee/jetwash the pebbles to clean it? They must be busting when they come in!