https://www.cgtrader.com/3d-print-models/art/sculptures/pooping-balloon-dog
Pooping Balloon Dog, dimensions: 63.10 x 129.51 x 146.18mm or 2.48 x 5.10 x 5.75in
Scale up or down as needed.
2 Files, dog is 250k poly, poop is 150k poly.
If you needed any help with the file let me know.