All of those look WC to me...if that's the case, there's no real way of knowing if any of them are 3 years old. That is a cool picture of them all huddled around like that though.
They do mention in the ad that the parents are on site, so it sounds like the claim is that they're CB... Who knows, though--perhaps they were raised outdoors and that's why they look wc? Or maybe the pic only shows the adults.