Together with the sacrum and coccyx, the pelvic girdle forms a bowl‐shaped region, the pelvis, that protects internal reproductive organs, the urinary bladder, and the lower part of the digestive tract.
The pelvis is a bone located on top of out thigh-bones and their function, apart to give mobility to our legs is to protect both masculine and feminine reproductive organs, the bladder and the end of the digestive tract.
→ Below you see an image of the pelvis. (Which in the image is the butterfly-like structure connecting to the spine and thigh-bones).
Answer take one piece of the squirrels diet away and see if anything has changed, if not give it that part back and take something else. repeat till change happens if nothing happens then change hypothesis