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9. ANIMALS AND DREAMS
Doctors are not a hundred percent sure that dogs can dream but they have been diagnosed as entering into an REM sleep which by definition is the Rapid Eye Movement sleep. This kind of sleep occurs in all kinds of mammals. The mammals basically use this as defense mechanism because they can wake up as soon as they enter the REM phase, as concluded by the doctors. This whole pattern varies from animal to animal and of course it is different for birds altogether!