Love my old golden- just turned 14! Santa left her under the Christmas Tree in 1999, and she’s been the best dog we ever have had. Kids are grown now, but is still have my old girl.
I have an aquaitnence with a golden that can count to 5.
He can retrieve 1 to 5 tennis balls as instructed.
Toss one at a time until there are 5 out there and say bring me three. Done! Can get 5 balls in his grasp at once.