your cat should go see the vet
Chanterelle
That description fits very many species.
If your toenail is thick than you problably have injured it or have fungus if it is a little yellow.
It turns your toenail dark (sometimes light) yellow, it smells bad and can make your toenail very brittle.
Because it is fungus
There are fungi such as mycobiont, red fungus, and yellow fungus!
Chanterelle
You need to take it to a veterinarian. That yellow mucous is probably an infection.
For the prevention of the yellow fungus just take this suggestion by viewing the site provided http://www.servicemagic.com/article.show.Lawn-Fungus.15543.html this may helps you .
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5% copper sulfite mix
That description fits very many species.
It turns your toenail dark (sometimes light) yellow, it smells bad and can make your toenail very brittle.
It sounds like an infection. Take the kitten to the vet for proper diagnosis and treatment.
Judge David Young - 2007 Fungus Finger Yellow Bus Was a Bust 1-119 was released on: USA: 6 May 2008
If your toenail is thick than you problably have injured it or have fungus if it is a little yellow.
Yellow nails are sometimes due to stains such as by saffron or turmeric. If not by food, the nails may be yellow due to fungus or underlying health issues. Such possible health issues include psoriasis or Type II diabetes.