Oh yeah mine were always the worst! But then a few months later they were the best. If she's not trying to attack the other dogs I wouldn't be too worried, it's probably just a immature brain and frustration. I found that the more I tried to work on this directly, the more I lost control and got frustrated which only made it worse for my dog. If I focused on things that we could do really well, it helped build his confidence and "sureness" (not sure of that's the best word, but just being secure with himself and neutral to other dogs).
Liesje & the K9s
Nikon (GSD) U-CH SG SchH1 KKL T1 FO PA TFE-I FDCh-S CL1-R UJJ U-CA HIT TT CGC, free reign semi-retiree
Coke (All-American), couch warmer extraordinaire
Indy (All-American), flyball star in training
Rainbow Bridge Kenya (GSD) U-CH FO OB1 CL1-R CL1-F RA HIT TDI TT CGC