>>4428318
Very nice. I would recommend starting with ceiling bounce flash. Good result and very easy to maintain good lighting on a moving subject.
I would also suggest getting an actual strobe system. They're much more powerful and let you use smaller apertures for easier focus. I have a novatron 1000 that works pretty well. Kind of a pain because it is not wireless, but whatever.

Normally I like very soft light for pets, so either a softbox or umbrella would be a good addition.
For really good pop you should try to illuminate your background more than your subject.

Composition.
Eye level is more of an intimate angle.
Above subject can be used to enhance cuteness or make subject look smaller, but you should be careful not to make your picture look like you're just standing there with camera to eye.
Camera below subject makes the subject look larger, towering, or grand. For your white cat it could be fun because she has a regal sort of look and it would enhance that.

Try placing one eye of your subject directly in the middle of the frame. This intensifies the eye contact and almost makes the subject's eyes follow you around.

Bring treats and have patience with your pets. :)