i would use both, as in tile for the floor of the cage and a small litter pan with shavings. if using just tile, there is nowhere for pee to soak up and your chins would most likely be sitting in it at some point, plus it could run off the edge of the tile and out of the cage if near an edge, making a gross mess on the floor (i have carpet under my chin's cage, that would be disgusting! lol).