Er.. Which cat nail art are you referring to? ^^;
This one or this one? I don’t remember making cat-related nail arts other than those two..
No, wait.. The cat designs are made in similar way. OTL
I made the base of the cat design first. Sometimes I made an outline first and then fill it up with colors, sometimes I fill in round-ish shape first and then make the base ear shape with nail art brush and then fill the color. Then I outline the cat shape and add other details with smaller nail art brush.
The details for the rest of the nails are made with either nail art brush or dotting tools.
I hope my explanation is clear enough. ^^;