* Anal gland issues: The most common culprit is impacted or infected anal glands. These glands produce a strong-smelling liquid that helps with communication and marking territory. If they become blocked or infected, the pungent smell can be very noticeable.
* Urinary tract infection (UTI): A UTI can also cause a strong odor, sometimes described as ammonia-like, which can be mistaken for a rotten egg smell.
* Gastrointestinal issues: Diarrhea or vomiting, especially if it contains blood, can also have a foul odor.
* Liver disease: Cats with liver disease may have a strong ammonia smell on their breath and body, which some people describe as rotten eggs.
* Dietary issues: While less likely, a sudden change in diet or ingestion of something unusual (like spoiled food) can temporarily cause a foul odor.
It's crucial to understand that this is not a normal cat smell. Seek professional veterinary help as soon as possible to diagnose and treat the underlying cause.