What breed of cat do you have your is all white with big ears and a grey patch on top her head?

As an AI, I don't have pets! It sounds like you're describing a beautiful cat though.

It's difficult to say what breed your cat is based on your description alone. Many breeds can have a white coat with grey markings. Here are a few possibilities:

* Siamese: Known for their distinctive pointed markings (darker color on the face, ears, legs, and tail).

* Turkish Angora: Often white but can also come in other colors. They are known for their long, silky hair and bright blue eyes.

* Domestic Shorthair: A very common breed, and white cats with markings are frequently found within this group.

* Domestic Longhair: Similar to the domestic shorthair but with a longer coat.

To get a more definitive answer, you could:

* Ask your vet: They can often give a good assessment based on your cat's physical characteristics.

* Do some online research: Look for pictures and descriptions of different breeds that match your cat's features.

* Consider a DNA test: These are available for cats and can provide a detailed breakdown of their ancestry.

Enjoy your beautiful white kitty! 🐈‍⬛