They don't look like they're all the same age. I know does have twins more often than cattle do, more like goats, but triplets? I think there's a pair of twins and a younger one. Do deer fawn-sit for each other, or is one an orphan?
After listening to Stony barking for a while, they began to move off, but not quickly.
They disappeared down the hill, stopping to graze here and there.