There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
Big cats have some dense bones for sure, even small domestic cats. All carnivores tend to have denser bones in general than most other mammalian families.
From what I've read, the tiger has the thickest forearm bones for body size than any other big cat, and the lion excels this in the humeral bone (especially ancient lions). Muscle mass contributes significantly to bone mass/density in wild animals, and the more muscle, the thicker the bones. Denser bones are contributed mainly from how strong the muscle is and the concentration of muscle within those bones.