Every day is a training day with a pup !
They do like to ''Push the boundaries'' ..''What can I get away with here?'' when they hit adolescence especially.
Literally whatever someone does with their dog is ''Training'' , wether for good or ill.
Ours at 5 months decided she didn't want her nails clipping..and began to ''nose bodge'' and bite softly at my hands, rolling over deliberately so I couldn't cut her nails.
Had I stopped til she was ''in the mood'', her nails would be like talons now..
Instead, I persisted, with kind firmness, rewarding with a treat when the job was done.
She is now miles better :)
Even sweet natured ones can'' try it on'' {Don't WANT to come in from garden!}... but simple daily training , not to scrounge at the table, not to pull on the lead, not to mouthe at hands.. but instead praise for
Walking nicely on lead, Recalling well ,
Allowing nails to be cut without fuss
Lots of positive rewards.
With out first dog I did feel a bit 'At sea'' when her recall went through an iffy phase {A Lurcher} I phoned the dog warden , was very good, and gave solid advice.
I'd say with our first dog, after a year, I felt that she really became a lot easier.
IF you are happy to put ''good'' daily training in place, Just by stuff you do with him, you could have a lovely, well mannered dog.
Plenty of you tube videos on dog positive training .