So, to answer your original question: you can call them a flock and be perfectly fine. But if you want to sound like a sheep-whisperer, use herd, mob, drove, or fold as the mood strikes you. It’s like having a vocabulary closet full of cozy sweaters—each one fits a different weather.
Next time you drive past those hillside cloud-critters, you’ll have a whole arsenal of names. You could even pick a favorite. Mine is mob, because it makes me imagine sheep in tiny fedoras, planning to take over the world. One pasture at a time.
And remember: no matter what you call them, those fluffy, bleating creatures are among the most peaceful animals on Earth. They don’t care if you say “flock” or “fold.” They just want a good patch of grass and a friend to lean on. Honestly, isn’t that a beautiful metaphor for life? Find your flock, your mob, your fold—whatever you call your people—and stick together. Baa at the world.