A few weeks ago the cat (18 months old, male, neutered) had a bit of a dicky tummy and a couple of times didnt make it to the box in time. Not great but I thought when he was better all would be ok. Not so. Several times, he's shat on the kitchen floor, in some cases not even squatting - he's just stood there and curled one out. His box I'd kept clean - I scoop after every pooh, do a thorough litter change once a week and a proper clean once a fortnight. It's a covered box and he happily pees in there, and usually poohs as well except for the odd time when it's as if he just can't be arsed.
This morning DH found a perfectly formed shit in the middle of the kitchen and proceeded to act like an idiot, frankly. He banished the cat to the garden, refused to feed him (and when I tried to, he kept shutting the door so cat couldn't get in - we have glass doors so no flap). He reckons this will make the cat think about what he's done and behave better in future 
having apparently failed to notice that the cat is not a child and cannot conceptualise what DH seems to intend him to.
It's lovely that DH seems to credit the cat with much more intelligence than he actually has but seriously, I don't know why cat is poohing on the floor now and again and I don't know how to stop it. He seems happy - he's affectionate, curious, eats well, doesn't seem stressed or ill or in pain. Maybe the smell has seeped into the litter box and it's time for a new one? I've scrubbed the floor with odour remover but it doesn't seem to have much effect. I really need to break this habit as I can't deal with wondering every morning if there'll be a little present awaiting me. Also can't deal with DH's weird ideas about the intelligence of cats! Any advice???