I have met two, a petsitting job I had taken on, and frankly wished I hadn't. They were the nastiest two dogs I have ever met
I blame the owner, she never socialized them, treated them to much like her precious little babies, they got away with murder
I took the job on an er type of thing, they would let me in the house, no way coud I take them out and walk them (tho I had previously met them with their owner and they were ok, but not happy mushy dogs)...Calld the owners and said there was no way I could get a leash on them, she said "oh just let them potty in the house!" WHAT??? well lady they are your dogs
Good thing it was only an overnite thing, no way would I have taken them on again, the owner , wasn't honest with me on their temps/issues.
I did write her a nice note, suggesting a dog trainer, but doubt she took me up on it.
Certainly not all dogs of any breed are alike, these two were more 'owner's ignorance'..
Cute dogs tho/