When I made the Cat and Dog, I cut out ears and feet from cardboard and taped (masking tape) them where I wanted them before putting the paper mache on. I used wire and taped it under the dog's ear to get the shape I wanted. I used the clay recipe to mold the ears and nose.
For the projects I'm currently working on, I used the clay to make the body parts instead of using cardboard. I found it easier to add the parts after I did the paper mache and clay. After putting on the layers of paper mache, I put the project in front of a fan to dry (rotating as needed).