Mousetrap 
To dream of a mousetrap signifies that you need to take extra precaution against people you do not know well. These individuals may be plotting something bad against you.
To dream that you are setting a mousetrap signifies that you will outsmart your critics and detractors.
To see a mouse caught in a trap signifies that you will fall victim to the opponents.
Guinea Pig
To dream of a guinea pig implies that you should use more consideration and accept liability for your actions. It also means that you will achieve success and ability through trial and error.
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