Frank started at about 8 mos doing the same thing, especially with intact males that would stare at him, I used LAT at first, and then trained the "leave it" command.
Both have been very useful with new situations.
frank(Rosehall's Duke of Hearts CD, BN, RN) gsd 4/10
indy (Indy Bluestorm CD, GN, RN,CGC) BC 4/06
king bc mix 9/03