A golden retriever is excitedly greeting a woman as a little dog walks towards the camera .
Chances are about even that a dog charges towards the camera because its food is in front of it .
Chances are about even that a dog charges towards the camera because its food is in front of it .
It is certain that a dog charges towards the camera because its food is in front of it .
A dog charges towards the camera because its food is in front of it .