If you wanted to do something with the "cats" concept, you could easily make it happen. Place another cone underneath the lower one, and give it smaller dimensions. You may have to make the transparancy a little less than the one over it. With the proper lighting and reflection scheme, it should appear that the space between the cones is of a certain thickness and has a hollow under it. It's an effective illusion. As for the cat, Poser comes with a basic cat figure (look in your side menu under figures, use the pull-down and look under "Animals") You can also find different fur textures and species types on Renderosity or 3DCommune.
Good luck!