Rats 
To dream of rats symbolizes the presence of extremely disagreeable or distasteful thoughts.
Alternatively, it signifies feelings of uncertainty, guilt, envy, or other repressed emotions that are eating at you. It may also stand for someone who personifies the characteristics of a 'rat.'
A black rat represents secrecy and deceptive acts.
A white rate is an omen that you will receive help from am unexpected source in your time of trouble and distress.
To dream that a rat is biting your feet portrays your daily life as a 'rat race.' You have a preoccupation with your ever busy waking life.
Rattle
To dream of a baby playing with a rattle symbolizes peace and quiet in the family.
To dream you give a rattle to a baby augurs of an investment gone bad.
Ration
To dream of a ration represents a desire for fairness and diplomacy in a time of stress.
Mice
To dream of mice implies that you should concentrate on more important issues.
To see mice feeding or eating indicates that you are being abused emotionally by someone who wants to make you feel unworthy.
Mouse
To dream of a mouse indicates panic, low self-esteem, and passivity. You may be experiencing feelings of inadequacy and inferiority for not being able to measure up to standards. This dream is telling you that it is time to let your voice be heard and your presence acknowledged, instead of hiding in the sidelines. Alternatively, it is also symbolic of small distractions and annoyances you are experiencing. The dream may likewise indicate a computer mouse which links you and the rest of the world.
To dream that you have killed or trapped a mouse suggests that there are persons in your waking life that are literally putting you down,
To dream that someone is eating a mouse means that there is something that you need to get off your chest, which may be guilt or a truth that has to be told.
To dream that a mouse is being chased indicates that you are afraid to make a stand. You are allowing other people to boss you around.
Adder
To dream of an adder means you should beware of a scheming or devious person. They should not be believed. This could also represent an individual or opportunity that escaped your grasp.
Admire
To dream that you are admired means that while you will advance further than those with whom you associate, they will not hold it against you.
Beaver
To see a beaver building a dam indicates that you need to expend a great amount of energy and determination in order to attain your objectives. You need to confront issues that may exist between you and your associates. You will need these people as allies, as they are detrimental to the success of your ambitions. Without their loyalty, you will possibly face failure.
Gerbil
Seeing a gerbil in your dream represents joy and satisfaction from little things in life.
Alternatively, it may mean that you are seeking for a new relationship or companionship.
Hamster
To dream of more than one hamster indicates a time of bustling activity, family outings and/or small celebrations. To dream of a hamster running on an exercise wheel implies that you may, quite literally, need to go for a regular walk or run. To dream of a singular hamster may be suggesting that a gift of food or a parcel of groceries could mean a lot to someone you know.
Lemmings
To dream of lemmings indicates a discomfort with repeating patterns. The same problem may be happening over and over to you or a friend.
A dream of lemmings may also indicate a distrust of authority. New leadership or a new direction may be needed to escape a path of unhappiness.
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.
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