How to care Grumpy White Persian Cat? To take care of a Grumpy white Persian cat, prioritize regular grooming, cleanliness, healthy nutrition, and regular visits to the vet, as well as realizing that their breed-specific characteristics may make them appear “grumpy.”. https://pursianpaws.com/persian-cat/how-to-care-for-a-grumpy-white-persian-cat/