Many animals manifest symptoms in other parts of the body than humans. Coronaviruses primarily cause respiratory illness in humans, but that doesn’t automatically mean it will be a respiratory illness in other animals.
FIP, the well-known coronavirus that infects cats is primarily an intestinal disease that can get into the lungs. I wouldn’t be surprised if Covid-19 affects cats similarly.
Similarly, influenza in birds is primarily an intestinal disease passed through feces. Yet influenza is almost always a respiratory disease in humans.
The corona virus causing FIP was previously known, existed for years in wild and domestic cats. And more importantly it didn't cause the current Covid-19 in human.
So the owner tested positive for Covid-19, her cat exhibited FIP symptoms, and the vet tested and found corona virus in cat feces, so what? It still does not prove anything to be worthy of a 'news story'.