It depends on the reason for it's problems and thereby dying, but the most common smell of most any animal that is dying from starvation, or the inability to eat and produce energy for sustaining life is a faint smell of acetone.
This smell occurs when the body starts degenerating/burning muscle-tissue in order to provide energy to sustain life.
it may seem stupid but i believe it means that ur cat only had a few months left to live because wen my 2 cats died they smelt like dead things a few months before
the cat is either dead or just needs a bath
yes
Cats eat cat food, so therefore their breath smells like cat food. Think about it with humans. If you eat pizza, doesn't your breath smell like pizza?
Its the smell of hops that comes from the breweries.
Your bra smells like you, and by rolling on it the cat can "mark" the "person smell" with the cat's own smell. In essence, the cat is claiming you as his.
cat urine
Your fish has issues
Death smells different at various stages of decomposition, some describe it like rotten meat only much worse. It is not a smell you will like or will ever forget.
Yes, cats seem to smell more like bananas. To test this yourself, go to your cat and go REAL close to it and have a whiff of it, if it does smell like a fruit (preferablly bananas) its a pure bred cat!
Death
Maybe your cat can smell the vet and doesn't like the smell because usually animals don't like the vet.Hope this helped!
Your dog may smell like cat pee because it got sprayed by a Tom cat. A cat's spray often smells like pee.
cat poo
Because if they can sense maybe an unknown smell on you like if you've been outside, they want to find out what it is.