Cat diarrhea accompanied by fart noises may be caused by parasitic infection, indigestion or other diseases. You should pay attention to the cat's diet management and feed it regularly and at fixed points, which is beneficial to the cat's gastrointestinal digestion. You can feed the cat some probiotics appropriately to help the cat. Regulate the gastrointestinal tract and deworm the cat regularly. If the disease causes illness, take the cat to the pet hospital for examination and treatment immediately to avoid worsening of the condition.