there's something stinky in the kitchen but its not a hamster carcass, what could it be?

Only one of these things hasn't been found in the kitchen before....

idea number 1=  the things that soak up blood when you buy packaged meat

idea number 2= rotting vegetable matter

idea number 3= rotting cockroach carcass

idea number 4= a week's worth of used tissue, that one week i had terrible allergies and drank a lot of milk....thick and gooey!

idea number 5= dinosaur poo

idea number 6= hamster carcass, like that one other time....