A group of UK Universities surveyed 285 dog owners and studied 69 dogs and found 8-month-old puppies took longer to perform basic commands that they’ve previously learned like “sit” or “shake hands”
Zoologist Dr. Naomi Harvey told BBC Newsbeat “What we found is evidence that dogs do show a period of reduced obedience towards their owners and this is specific to their owners not to other people,”
Dogs show disobedient behaviors when they hit a type of “dog puberty” at around 8 months. Just like humans in their teenage years go through hormonal fluctuations that reshape their brains.
source:
https://www.bbc.com/news/newsbeat-52648436