Found this partially submerged in the soil. Initially thought it was some kind of egg, but when I dug it out and felt how heavy it was I knew it was not. It is almost perfectly spherical, very smooth, and dense. There is a tiny nodule on one end (not visible in this photo). After doing some research, I suspect it is some kind of bladder stone, possibly struvite or oxalate. Bladder stones are common in canids and felines but other animals can get them too. (Click here for an examples). Just curious if anyone else has found similar stones, and if there is any way to judge age? Would be super cool if it came from, say, a dire wolf!