Life is all about learning and becoming better and so is the case with dogs. Dogs are the kind of animals which learn quickly, but not all dogs are the same just like not every human is.
Here’s a video of two Dachshund puppies among whom one is quite dumb and another a bit smart. So what the owners do here is crosscheck the fact by making a box of empty cans on the floor and putting one of the puppies in it. The puppy tries his best to find a way out, tries to jump out, but he couldn’t until its owner puts aside some of the cans to make a way through the closed box. The same thing is done with other puppy which, in no time jumps out of the box and leaves its owners amazed.