This design is based on an ancient ivory sphinx. Find the source here, and scroll down a little.
It occurred to me as I was working that this is basically a 700BCE Pokemon. lol
You will need a program that can handle overlapping volumes. Repetier Host and Cura will work. Simplify 123D will NOT work.
Use support material, so that the chest builds on top of the legs.
Choose whatever scale you want. At scale 1, I recommend a resolution of about 0.1mm.
I designed the pieces to come together. Slide the wings on sideways, then rotate them down into place.