An international group of experts on cognitive science has asserted that animals, including many that are much different from humans, experience the same degree of consciousness as humans. Per the article:

An international group of prominent scientists has signed The Cambridge Declaration on Consciousness in which they are proclaiming their support for the idea that animals are conscious and aware to the degree that humans are ....What's also very interesting about the declaration is the group's acknowledgement that consciousness can emerge in those animals that are very much unlike humans.... "Consequently, say the signatories, the scientific evidence is increasingly indicating that humans are not unique in possessing the neurological substrates that generate consciousness....The declaration was signed in the presence of Stephen Hawking .... (bold added).

http://news.discovery.com/animals/animals-consciousness-mammals-bir...