That's interesting.  I never knew that cats who are the alpha cat don't
always cover their messes.  My female cat has a covered litter box and
covers usually unless it's been a day or so since I sifted it out with the
handy sifting liners I use.  Do you think that she sometimes doesn't cover
because the litter box is covered or because she thinks she is the alpha
cat?  Do females have the whole alpha cat thing?  She is quite and
independent little thing, though most cats are :)  She does come to snuggle
sometimes though :)  This is a little off topic, but I was intrigued by a
reply to the OP. Sorry :)

Beth