Cactus and Fossils

Keith sent me this photo of a Ferocactus pottsi and a carnivorous dinosaur and a fossil. He says this is the proper way to use a fossil in a cactus pot. Did he come up with this himself? Or did a customer ask him to repot this cactus along with adding the two toys?

I shall never know for sure. It is a mystery.

I wonder if that is a mammal fossil? It is a mystery.