Bad.
If you're asking what compounds cause the smell of a dead and decomposing body (rat or otherwise), there are lots of them. Two particularly foul ones go by names suggesting their odors: cadaverine and putrescine. Both of these are diamines. Amines in general have a reputation for smelling bad.
Because people do not clean their cages out right. Feral rats smell because they eat trash.
yes
if they go to the restroom. If you do have rats call the exterminator.
yes
Very good. I think it's either better or the same as a dogs! I have rats and whenever I leave a little treat 4 them on the floor they instantly smell it and run to it! <3 Hope that helped! From, a rodent lover.
annoying
They dn't exactly smelll. You accually can smell them if you get close though. And they smell bad because they are dirty!
Some rats and mice just like the taste or smell of it. :)
becuse they have weak legs!
Actually since ferrets are natural rodent exterminators, their scent will actually repel rats.
Not at all. They smell like their bedding material and a littly musky.
Rats can definitely smell! That's how they find there foods, such as maybe foods that people give up to the trash. They will sniff their intelligent little selves to the target, other none as, "Food."