Figure 40.7: Young Hyenas Must Mature to Feed on Bone Rapidly Spotted hyenas of various ages were given a standardized “bone-crunching test.” The amount of bone they could consume in 15 minutes increased dramatically as they aged and their jaws and jaw muscles became stronger. Young animals are limited in their ability to compete with adults during group feeding behavior at a kill. The line was fitted by linear least-squares regression (see Appendix B).