Osiris found a creative and messy and expensive way to let me know he is unhappy with recent changes to his diet:
Mostly he shredded the toilet paper off the rolls, but he did eat some. What does it say about diet cat kibble when toilet paper is more palatable.
After two days of not eating and five shredded rolls (after we took to hiding the rolls away, we realized he can open the bathroom cupboards), I broke down and bought another bag of his full fat kibble. It took an additional day before he resumed eating, but only when no one was watching. Ezri was not enthused with this development as she was enjoying eating both their allotments of food, diet and regular.