Simple 2 part model with a mating lip. Print both parts flat, no supports required.

Please make sure to seal the print with a reptile safe sealant, and allow time for any off-gassing that may occur to protect your pet! I recommend Minwax Polycrylic Clear Matte Water-Based Polyurethane if you want to clear-coat. Dusting with grout between coatings is a great way to add texture, just make sure to seal over the grout!