Have been around them most of my life. They learn well if you teach them well.
Had a Labrador that was the stupidest thing of four legs..........
That’s true, a Shepherd certainly requires instruction and a master.
The dumbest dog I’ve met, and I feel bad for saying this ‘cuz she was very sweet, was a Dalmation.
As far as cat intelligence goes, I have a 20 lbs butterball named Stormy who shares the house with three German Shepherds, so I have to give her credit for smarts being able to survive the wolf pack here.