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By "dream", I mean:

  1. Dreaming while sleeping.
  2. Dreaming about their future life while being awake.

Thank you in advance.

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I think this question is useful and clear even if it shows little research effort (+1). IMO dreaming is an interesting biological phenomenon. I wish that those who gave the two downvotes gave justifications. –  winerd Jun 24 '13 at 8:35
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There have been experiments with cats whose brains were leisioned to eliminate sleep paralysis. These cats exhibited behaviors like hunting I imaginary prey, grooming, etc. this was interpreted as a cat dreaming –  Alex Stone Jun 26 '13 at 1:08
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You might be interested by this post –  Remi.b Jan 7 at 13:05

2 Answers 2

According to this Psychology Today blogpost, it is quite likely that animals can dream. Particularly mammals that according to the blogpost:

All mammals share the same neural structures that are important in sleeping and dreaming.

However, for your second question, I do not think it is at all possible to know what they are dreaming about (if they indeed do dream).

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If I'm interpreting the Nature article linked to in that blogpost correctly, they not only claimed to know what the rats were dreaming about (sort of), but to be able to influence it! –  Oreotrephes Jan 7 at 13:54

From the ScientificAmerican

Yet, given the vast documentation of realistic aspects to human dreaming as well as indirect experimental evidence that other mammals such as cats also dream, evolutionary psychologists have theorized that dreaming really does serve a purpose.

Although the linked article doesn't look like they were talking about animals. But I wont purchase the article to check that...

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