They had four sachets each yesterday. Four. Sachets.
And dried food.
This morning I came downstairs and thought it was unusual that they were not in the kitchen yowling for their breakfast - they usually start 'serenading' us at around 6 am but this morning there was blissful silence.
Then I found the roast chicken.
It was leftover from dinner yesterday. Carefully wrapped in foil, and put in the oven, ready for me to make another dinner with it tonight. The oven was definitely closed when I went to bed because I know what they are like with food, especially chicken. Those little fuckers managed to open the oven door in the night and pick it down to a bony carcass 
WTAF?!?! Did they grow opposable thumbs in the night?!?!