
This is not just a flatcoat thing - many dogs do it as teenagers. The worst dog I ever had , years ago, was a neutered beagle
bitch that we had re-homed !!!!!
I think you need to work on lots of basic obedience - clicker training and positive training with other dogs as a distraction. It's actually fairly easy to stop it, actually - best if you get a qualified trainer to show you how.
We run five entire dogs with our pack, three used at stud, and trained with distraction methods, they are so focussed on us that they don't think about anything else.
From the experience with the beagle, castration/neutering won't stop it - it's not a substitution for correct training.
Jo
Casblaidd Flatcoated Retrievers