our 20wk old red fox lab puppy has decided to bark at anything and anyone, and not stop!
She's quite a confident wee girlie normally, and has been well socialised, schools run, train stations, dog shows etc etc.
Barking at people coming to the door, I can understand. The postie got a full on bark today, but just laughed at her-he has 7dogs 
However, also barks at random people in the street-lady and toddler (I have 3DC, of 7,5 and 2); old lady walking behind us, kept stopping to try and bark at her; the butcher, despite him hand feeding her lamb mince
-stopped barking long enough to go and eat the mince then started up again! Doesn't bark at everyone, just random ones 
Tried ignoring, tried silly Billy sing song voice, resorted to a good old be quiet when couldn't hear what postie was saying today.
What now?