Oh, poor Finn. My Ruby was food obsessed when I adopted her, but she didn't resort to eating fuzz or other non-food items. She did once eat a muffin paper I'd left on the counter just long enough for me to go into another room to eat the muffin. I panicked and called the vet, who said it should break down from stomach acid and be fine, and it was. Or at least I never saw the muffin paper again.Yes, I've seen him eat things that aren't edible, so I have to keep a real close eye on him. I recently saw him eat a tiny soft plastic cap that came off a piece of workout equipment; that's when I realized anything was fair game for him. I've seen him eat a piece of fuzz, too. So I've become very careful about what's on my counters and floors. Breaks my heart to think of him starving at one point to create this food obsession.
It took Ruby about 8 months to get over her "stray cat food obsession" so hopefully in time Finn will learn that he'll never go hungry again, and won't try to eat everything in sight.