This is what Peter Caine Dog Training says
These are some of the tool and the process to do cross section of the damaged Bigfoot head. It took about 40 minutes in total but once the bone of skull was cut the other part was very fast due to it being dried out. All the dust had a greenish hue noticeable in the dust from bone. This specimen was picked because it was the most damaged from what it looks like something heavy falling on it, broken jaw and smashed side of face, I do not know how it got damaged I didn’t know about it my father is gone now go can’t ask. All the specimens were acquired by him in 1953 and kept in freezers which dried them out