If there s still no sign of the corpse it could possibly be in an air duct a wall cavity the attic the crawlspace or in the sealed underside of a kitchen counter.
Found dead mouse in attic.
It s not a pleasant or enjoyable task by any means but the odor will be stronger around the mouse.
Inspect your attic and crawlspace too.
Mouse urine and droppings dry out relatively quickly but just removing moisture doesn t kill germs.
It all boils down to this find and remove the source of the dead mouse smell.
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But the stench of the dead animal collects and lingers in the house below.
The attic is usually well ventilated.
Try to locate the origin of the dead mouse by walking throughout your home and smelling the air.
This all comes down to air flow.
The interesting thing about a dead animal in an attic is that the odor is actually usually stronger inside the house than in the attic itself.
Out in the wild most mice are quickly eaten by housecats owls fox snakes and all sorts of predators.
If you use mouse bait containing food and a rodenticide without trapping the mouse the smell of dead mice in the attic may be a problem.
But in the safety of your home they just may get to die of old age.
If you can t find the source of the rodent odor apply odor eliminator regularly until the mouse completely decomposes and no longer emits the smell.
Check the traps daily to dispose of mouse bodies and replace the bait.
Check in rooms crawlspaces basements attics garages storage sheds any anywhere else you can easily access paying close attention to the odor levels.
Set some mouse traps there are two types of mouse traps available and they are live and lethal mouse traps.
Live traps such as box house mouse traps and glue traps are useful in getting mice out of the attic without killing them.
If there s no evidence to point you in the direction of an impromptu mouse graveyard follow your nose to the most concentrated area of the stench.