i will start with the color, size, shape, age and its action. Then, you can talk about the things you and your cat did together.
you can write that the cat is pure white, very small. she looks like a little ball of fur. although she is only 6 months old, she is quite smart, for example, she cleans herself everyday and she knows where the toilet is. she is also friendly, for instance, she likes to sleep beside me and she always seeks my attention. we had a lot of fun together...
thats just an example, hope that is useful. good luck
