Some cats are just big, my dude. I've got an 8-month old Ragamuffin who's already 13 lbs / 6 kg. He's expected to grow past 20, it's normal for his breed.
The issue isn’t just the 18 lb, it’s that one tiny paw that they’re putting all of that weight on, that just so happens to be resting on a rib, or worse between 2.
