The Changeling

The stories are true. I never thought much of them. Why would trolls replace babies in the night with changelings?
The evidence is undeniable. First, I noticed the dog food. He must have placed it into the water and let it soak for awhile. When I found it, he had smeared it all over the kitchen floor, in a stinky, brown, gooey mess. Then there was the smashed and broken aloe vera plant. Whether it will ever recover is unlikely. Now, I have found crayon lines on the bathroom floor; hieroglyphics of his race. He is playing with said crayon in the toilet and the splash of water sounds so musical. What have they done with my calm and sweet baby and how do I exchange them back?