hi, my cat is about 3 months old, and his rear end reaks... I dont know what the problem is, he doesn't have diarhea or anything, i read somewhere that he will outgrow it. I sure hope so, I mean I love my cat, but jeez, why cant he clean his own ass.
I would definitely change your brand of cat food. Don't do it suddenly, however, because that also causes a digestive upset. I assume your cat has diarhhea? Don't give your cat milk or a constant wet food diet. The baby wipes are a good idea.
The food plays a big role in stinky poop. Make sure there's no blood in the poop. Blood in poo smells REALLY BAD! I'm sure you guys know that cat poop smells pretty bad but when it is intolerable even if you scoop the box everyday then somethings could be going on with your kitty. The reason poop stinks is the bacteria in the bowels. CAts and us too have a normal amount of bacteria (E.coli) in our intestines. Sometimes things can disrupt our normal flora and cause that bacteria to grow more than usual or not grow enough. The smell from poop is actually the dead bacteria. EWE I know! SOOOooOOo when the poop is REALLY BAD it should alarm you that somethings not right. It could be the cat ate some scraps or more severe as the cat may have a infection or a tummy bug.
When my cat was a kitten, she seemed to be unable to keep her butt clean as well, and stunk! Even though cats hate it, I gave her a bath (carefully cut her nails first). Your aren't supposed to bathe them often, but it may help to get rid of initial smell.