Jack's breakfast post this morning. There's a lot of information to glean from this. First, this breakfast (as pictured) seems completely fine, but we can see from the card that Jack is on a "consistent carbohydrate" specialized diet. We can also see that he cropped a banana and oatmeal from the image.
But most revealing is Jack's compulsive pissy reply of "ok" to every comment. I'm starting to think his last stroke has damaged the part of his brain responsible for emotional processing. It was shirking its duties to begin with, but now Jack is nothing but a wheezing mutant, banging its claw on the table for murr bacin.