It's uncertain, as rats rely heavily on sense of smell & usually depends on what foods are availabe. I would estimate no more than 1 km.
the rat is a snitch, so to smell a rat means that u think there is a snitch
i smell a rat is an idiom which means to dectect, suspect or to find the tricks of some on. Ex. I smell a rat of JOHN against Shaun.
Odeur d'un rat
Of course, it has a nose.
No
The expression 'smell a rat' means that the speaker believes there is something unacceptable in a situation that looks acceptable on its face. Example sentence: The client claims that the fire was an accident, but I smell a rat; his complete coin collection was safe in the trunk of his car.
You smelled a rat in the matter.
no
The Only Way To EVER Get The Smell Completely Out, Would Be To Find It. Call an exterminator to do the job.
Rat poison can have a bitter and acrid odor. It may also have a chemical scent due to its toxic components. It is important to handle rat poison with care and avoid inhaling its smell.
they have smell , touch ,taste,see,hear
20 ft