Well... I know our pups aren't 'teenagers' for years ha ha but Molly well and truly went through that phase. The times when her legs are waaaay too big for her body and her ears don't yet fit her face (who am I kidding, that's still now! ha ha) and also the time when they decide they no longer want to listen to their human/mum!
Molly was the best behaved puppy out of Jess's 4. She was the quietest and to be honest, she just loved cuddling and having people fuss over, very different to Scooby and Millie who were complete rebels from the moment they could walk. But when Molly hit about 6 months she decided she would turn in to the most stubborn little thing around, maybe it's the border in her? she was very difficult throughout a few months so I now always refer to it as the teenage ages, we went to doggie school and I think she tested the teacher too ha ha!
It's well and truly a phase that is gone now, as she listens to me more than Jess now and is very in tune to me but I'll never forget her rebellious in-betweener stage :-)