A dog movie that has been caught without being able to overcome empty cans

Rumors that cats can not get close to PET bottles containing water have been popular in the past, but it is a dog's movie whose surroundings are surrounded by empty cans and why it can not move anyhow. Even if I place things that are interesting such as toys outside empty cans, I am confused because I can not cross the boundary.

Details are as below.
Empty can field.


I can not get out why even if I put a toy.


I responded to the duck aloud.


A penguin comes out, scratching the empty can, but I can not get out. What on earth is it obstacle?
YouTube - Dog Can * t Get Out