Gonzo has issues with hyper dogs and puppies, too. He's never snarled as far as I've seen, but he growls and turns away from them. I do think it's partly a dominance thing - demanding respect from a younger dog that they see as unpredictable - AND she probably knows puppies are reckless, so when she's on-leash she feels attached to you and doesn't want the hyper reckless puppy to bother you or her. If this really concerns you, try to find a good behaviorist to talk to. Since this is the time in Georgia's life when she is actually showing her real personality and maturing, this probably isn't a NEW behavior as much as it is a behavior that was hidden before by being a puppy herself.

I can't figure out the older dogs, shepherds, and husky annoyance. My dog actually loves basically every older dog, shepherd, and especially Husky that he meets... because they tend to be nicer dogs when playing, and my BC plays exactly like a Husky. Huskies and Shepherds have waaay different play styles from Labs, so that might be an issue with her. Labs tend to body-slam and chase (in my experience), and Huskies are more wrestly and such. Gonzo is actually Lab-a-phobic probably because he really dislikes their play styles. It just shows you that all dogs are different and have different likes and dislikes!! She could've also had traumatic experiences with a Shepherd or a Husky (pretty similar breeds in some ways, so she might just relate the two breeds as one) while she was in daycare - Gonzo has been attacked by a Black Lab and a Rottie, and now he still vehemently dislikes both breeds in most cases, while he loves most other dogs. The older dog thing, could very well be dominance. A lot of young dominant dogs go out of their way to show off to older dogs, especially since older dogs are much slower and weaker than a young pup. She probably likes dogs her size and age because she does not feel threatened by them.

^_~ these are my ideas anyway, having my own breed-biased pup. I am not a professional at all, so seeing a behaviorist would be a good idea! I'd try to arrange plenty of one-on-one socializing with slightly younger dogs, on very loose or dropped leads (so that in case she gets too overwhelmed you can just grab her lead). I'd try moving from slightly younger dogs, to a few months younger, and make every experience she has with or around a puppy very positive and brief. You really can't expect her to lover EVERY dog (although Labs can be notorious for this, it doesn't apply to all of them)... just like you don't love every person you meet. Good luck! And, we'd love some pics of Georgia! She sounds like a sweet Labbie girl