A friend gave me a dead (stray) cat that passed away due to a severe feline upper respiratory infection. There was no trauma indicating he died of anything else, and his lungs/chest cavity seemed to be on par for an upper respiratory infection, so I thought nothing of it. He was an old fellow, missing several teeth, his sternum is fused and wonky, several ribs have signs of healed fractures... nothing really out of the usual for an old tom cat when it came to most of him. However, there were a few things that struck me as a bit odd, namely his skull and these mysterious bones found with his back end: They look like chevron bones... but do cats HAVE chevron bones? I'd expect this in an alligator, an otter, a beaver... but there's at least five of them so far and they're all consistent in shape! They're not the baculum or part of the hyoid process as I have processed the baculum and hyoid group separately. I've never processed a domestic housecat from raw to finish, so I've never come across this before... and if felines do have chevron bones, bobcats, which I am more familiar with, wouldn't have them, probably, so that could account for a lot of it. As for the skull... He's missing half of his nasal conchae! I did not do anything unusual; maceration with a fresh specimen, rinsed and degreased... and lightly whitened so far... no heavy flow of water was near his face at any point or anything. No bugs. Nothing! Could this possibly be a result of the upper respiratory infection that ended his life? Another bizarre aspect of this would be that either side of the skull, the lacrimal bone was dislodged during cleaning... while the rest of the skull is pretty firmly fused. I've got both of them and can replace them once he is done being whitened and degreased to my satisfaction, but it just seems bizarre to me, as I've never had this happen with any skull... but I mostly work with animals in good physical condition, not animals with medical deaths.