A dog’s guilty look is just a myth, experts claim
Scientists do not believe that dogs can feel complex emotions such as guilt and shame, despite their apparently guilty faces. Dog owners have long believed their pets have a distinct guilty look when they have been naughty. But experts have revealed that although dogs do feel a range of emotions, any perception that they feel guilt or shame is likely to be misconceived.
Research suggests they are simply reacting to their owner’s body language rather than actually experiencing more complex feelings.
http://www.telegraph.co.uk/lifestyle/pets/11822498/A-dogs-guilty-look-is-just-a-myth-experts-claim.html