I hope she joins up too.

I'd really like to get her some suggestions for a dog-aggressive young dog like that, besides a prong.

not that I'm aware of, but you get a very strong display, her goal is a CGC but I don't see that happening with the positive re enforcement only style of training that she was doing. mine isn't what you call a success. she gives the attitude she gets and has a small queer zone. if a dog is minding its own business and doing its "job" then she'll keep working, some strange dog comes up and want to play the ranking game then we have to put some distance between them. in short if your dog is cool then mine is cool

She's asking me for advice because mine are so well behaved and a leash seems redundant. Of course I pretty musch used Ed's vids and materials exclusivly and time at the club.

This is a really hard call.
If the pup did learn this from her older dog, then it isn't really what I'd call aggression.

As an example, my grandfather used to have two really great dogs.
Lady was a greyhound/lab mix, that loved to chase varmints of all shapes and sizes. Typical of the greyhound in her, I suppose, and if you said "squirrel", she'd immediately start looking for varmint.

When Lady was an old dog, 6-7, my grandfather got a Bouvier des Flanders, named BJ.
BJ watched the "squirrel" routine with a lot of interest as a pup, and even long after Lady had passed away, if you said "squirrel", BJ would charge outside, make a circuit of the yard, and then lay down.

BJ had no idea what a "squirrel" was. A squirrel could have walked under his nose, and he wouldn't have paid it any mind, he just knew that when you say "squirrel", he was supposed to run around like a maniac.

The moral of the story? Just because the dog appears aggressive, doesn't mean that he really is.
And if it isn't true aggression, properly applied marker training can work to stop this bad habit.