Research thus far:
Wiki'd collies and looked through the sub-types
Googled "dog herding children"
+ found the following:
The dog will come into play in my story in Massachusetts, on Nantucket Sound, in the early 2030's. The family has just had a baby, and also have a 16- and 6-year-old. The dog is going to be a gift from a very wealthy friend, so the pedigree makes no difference. I'm looking for a dog breed that is low maintenance in regards to grooming, suited to the weather in Massachusetts, has a strong herding instinct, loves the water, is a good guard dog, is good around cats, and is good with very small children. It needs to be sturdy (and gentle & patient) enough to be able to carry a child around on its back, also. I would prefer a medium- or large-breed dog; the father hates small yappy dogs, and can't be bothered with extensive grooming, even if he doesn't have to groom the dog himself.
It's going to be trained to herd the children around, especially once the new baby starts crawling/walking.
From the second link above, it seems like a collie or a German Shepherd would be my best bet, and if I go with a collie, I'll probably go with an English Shepherd. I'm mainly looking for personal accounts/videos (videos would be especially appreciated) of dogs herding children around; I only have vague memories of our Border Collie herding us around when we first got her 13 years ago.
Thank you in advance! ^_^
Also, can we get a "pets" tag, by any chance? I volunteer to go through and tag old entries, if any help is needed ...