Furry Variables
Here's a small example of how intelligence varies from dog to dog, using my 3 dogs as "proof": Take 1 Kong. Add some peanut butter. Put in freezer. Give to dog. Willie : Lays down, puts one paw on the Kong, and lick lick licks out the peanut butter. Works on it until it's empty. Frankie : Picks up the Kong, goes to the tile in the kitchen, drops Kong on floor, stuff falls out, he eats it. Rinse, repeat. Barney : Looks at you like you have to be kidding, walks away leaving Kong where you put it. It's obviously too much work for such a small pay off.