My older brother found the skull in the woods of Kentucky. There's no known cause of death from what I've got, so who knows how it died. Also, my apologies for the bad photo quality; I don't feel like getting my camera out and looking for a good spot with enough light.
I couldn't resist.
On younger animals, including puppies, sutures wouldn't be fused...as this skull appears to have fused sutures. Especially over the cranium itself, they seem pretty fused. So I strongly doubt this was a young animal. Sutures, and teeth are the easiest ways to get an idea on the animal's age.