Does a Cat's Pee Stop Stinking After It's Neutered?  by Betty
Lewis, Demand Media     When an un-neutered male marks with his
stinky urine, he's signaling his availability.       There are
many benefits to neutering a male cat, including decreasing his
desire to mark territory. When an intact male cat sprays urine,
it tends to have a very strong odor. Neutering your male cat not
only will make his urine less stinky, but it has other benefits
for him.      Why Does My Cat Spray?      When a cat sprays,
he's leaving small amounts of urine on vertical surfaces, such
as walls or trees. Typically, he keeps his back to the area and
his tail may quiver while he releases urine. Occasionally, a cat
will mark territory on flat surfaces. Cats mark territory to
signal their ownership of a spot or that they are sexually
available. Although male and female cats will mark with urine,
it's most common in un-neutered male cats. Intact males, or Tom
cats, have an unmistakable odor that is very strong and pungent.
Neutering