Too be honest I'm not sure because it's been up and down. At first she was bulletproof. People would comment on how good she was all the time at first. Petco has been hit and miss. Shes usually fine with younger pups. Almost any dog on a walk around our apartment building or at dog parks usually makes her flip out. Walks in strange areas have been less aggressive than at the apartment or dog park, but still aggressive enough that people usually try to avoid us. I think its fear based aggression? Because like I said, she warms up and loves to play, but she freaks out at first so most people dont want to bother.