Random aggression toward dogs
I've read through several posts on here and I've found some ideas that I'm going to try with this issue, but I wanted to see if I could get an opinion on my specific situation.
My Sadie who will be 2 next month, over the past year has developed a random aggression toward dogs. Some dogs shes absolutely just fine with, others she'll bark at from a distance, and still others she'll act friendly until they get close and then she starts barking and snarling.
During her first year my wife and I owned a home, so she had her own yard, etc. We socialized her quite well, took her to PetSmart, dog parks, etc. She was always so friendly, a little timid, until she warmed up. But she was never aggressive, until we moved into an apartment.
Once we were settled in the new apartment she slowly started barking at other dogs and now it's really become a problem. I've tried getting her attention with other commands , telling her no, etc, giving her a light swat on her hind. She basically ignores me until I drag her away.
It's getting really frustrating, people won't come around us in our apartment complex when they see us with our dog cause they assume she's people aggressive based on her behavior toward dogs. When we take her to the dog park, she does fine with other dogs, she's still timid and if approached by multiple dogs at once she may stand her hackles up or bare her teeth, but otherwise she acts fine.
I'm going to try using treats again to get her attention to follow commands when distracted by other dogs. What else can I do?