You should of met the small 3/4 poodle 1/4 lab I had ,
it came from a licensed welsh kennel that bred that type most were selling fur over a grand back 10 years ago , it had slightly undershot jaw and the owners was closing the business .so the dog was reduced in price .
The dog had no encouragement from me but would regularly raise its lip and give a growl to door knockers and various people met whilst walking . It was very protective of me .
when I grew up in Dorset in 70-80s it was collies and jack Russell’s that was most common to nip you .labs were very calm .