We have 3 cats, all under a year old. The two females are fairly painless when it comes to the littler tray (though the fact we have to use one is because they are the pickiest little shits around and hate getting their paws wet, so refuse to dig up outside when it raids, which is half the year). The little male... he wakes you up when he shits in the night. It's that loud and THAT smelly. He was found by some domestic workers who fed him on sadza (like porridge) for the first few weeks of his life, and then the MIL found him and "rescued" him by feeding him on dog food and full fat milk. /facepalm. Tried telling her cats are lactose intolerant but she was having none of it. Anyway, he adopted us after sneaking over and drinking the WATER and CAT food we have down for our kitties. His belly isn't distended now and he isn't in pain when he poops, but there must have been some permanent damage for the persistent squits and stench of pure death to still be happening.
I love my cats. I just wish they smelled a little less.