When I got my house 27 years ago I found a large, dead, mummified cat in the crawlspace, he died with his head reared back, mouth open, scary! He is still in that crawlspace, somewhere?
The old furnaces that had a round tin jacket and a conical top full of sand (For fire protection and keeping heat in) would see numerous dead rodents in that sand with a cat sometimes, a nice heated litter box!
I was once given a cow skull for a house decoration. After I had it awhile and the Summer arrived .. I began smelling this mildly terrible odor . Not ALL of it's brain cells were removed! The skull came from some mountain area in California, I believe , high and dry there .
Outdoors when victims walk through the tomb, they begin walking on steel grating and under the grating are real cow/horse bones, they don't stink, they were brought to town from some digging at a farm when this City needed some black dirt. These bones I believe, are Very Old and they were buried. They must not be too "Yummy" since the skunk and raccoons left them alone.
and which of the house human skeletons are real? Just two of them, mine and my Wife's! we are still using them, we depend upon them for "support"!