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Aggressive Mouse Behavior

Mice may bite you or another mouse.

By Audrey Pavia

Mice bite in self-defense when they are afraid, and to send a message that they want to be left alone. If your mouse bites you when you try to handle it, spend more time taming it. You can do this by offering treats if your mouse climbs onto your hand.

Avoid the urge to put your mouse down immediately after it bites you. This teaches your small pet that biting ends handling, and reinforces the behavior.

Mice can be very aggressive with one another. Most fights are the result of territory wars. Do not house two un-neutered males together. Females usually get along with each other, although may sometimes squabble.

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Aggressive Mouse Behavior

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Reader Comments
My husband and I got some does for Christmas, and one is exhibiting strange behavior. When we hold her she is just fine, and when my husband puts his hand near the wire cage, she just nibbles at his hand. However, when I put my hand near the cage she attacks me. Not the friendly nibble that is with my husband, but quickly and agressively, this is every time. I have tried to do the food in the hand trick but it doesn't seem to be working. So I have 2 questions; A) Why is she doing this? B) It is distressing to have a pet reject you, how can I make it stop?
Kristin, Redlands, CA
Posted: 2/21/2015 11:24:25 PM
My sons 2 new white male mice have always fought. The fat one always attacks the small skinny one. Today we woke up, after having the mice for one month, and the small one had a huge bloody butt, just above the tail. I am having to wash and disinfect. I will be getting separate cages.
Virginia, Knoxville, TN
Posted: 8/6/2014 8:04:43 AM
My mice will sometimes bite my hand when I hold it out for them to climb on. I think that they are trying to see if my hand, or fingers, are food.They normally walk up, sniff my hand, then nibble. My reflex pulls my hand away then I put it back. After a few attempts they stop unless I use a different soap before handling them.

P.S. always wash your hands before and after handling mice. This protects them from disease and eliminates food smells from your hands.
Sean, Chico, CA
Posted: 3/9/2013 8:16:23 PM
i think small animals only become aggressive when they are either mistreated, abused or neglected. they bite because they are afraid, and feel threatened. i know because i have a cat, a dog, and two gerbils who never bite or hurt me.
ravyn, dayton, OH
Posted: 10/20/2009 4:07:57 PM
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