I managed to get Henry to eat his way through the huge bag of Burns kibble I had, even though he'd gone off, it by soaking it down to a mush. But even that wasn't working. I've been planning to swap him over to Millies for a while so decided to start today as he's barely been eating his kibble the past few days. They say it's okay to swap it over in just one day, mixing the old and new kibble 50/50 for the first day.
So I put half of Henry's normal kibble and a half portion of the Millies into his bowl and mixed them together. I've just come back to find all the Millies kibble gone and the old kibble left in the bowl. Well, I suppose the change over is complete, then.