Why do some Scottish Folds chirp in tiny noises instead of giving proper meows?

That chirping is typical of many Scottish Folds, and it’s not a defect. Their unique ear cartilage mutation affects more than just the ears-it can subtly influence the shape of their larynx and vocal cords, making a full-throated meow harder to produce. So you get these soft, bird-like trills and chirps instead. It’s their natural way of communicating, and it’s perfectly healthy. I’d never push a cat to “meow properly”-that’s human vanity. Respect the chirp; it’s as valid as any meow.