Sorry to be indelicate, but there it is!
My three year old spayed female house cat has started refusing to poo in her covered litter tray. We have another cat, her brother from the same litter and they are very affectionate and tolerant of one another.
We moved house six months ago and she now has lots more room to hide/play in. She is not overly fond of our two year old (child, not cat!), but again, she has plenty of places to hide in.
She has form for this sort of behaviour when the litter tray is not to her liking (i.e. pristine, virgin Catsan), but the litter gets refreshed every two days as it always has. It is just within the last two or three weeks that when I come downstairs in the morning, there is - without fail - a big poo on the kitchen floor, waiting for me to clear it up. There is usually one on our living room rug when I get in from work, as well.
Does anyone have any experience of this behaviour? As she seems healthy in other ways, I am concerned it may be behavioural. She has always had a somewhat nervous disposition. Both cats have always been house cats, owing to a combination of busy roads and breathtaking stupidity (theirs, not mine - hopefully). Any thoughts and advice would be greatly appreciated.