Dog blamed for poop on the stairs

I find poop on the floor. My son shakes his head and says “bad doggie.” It looked small enough so I cleaned it up and scolded the dog.

Then I see more on the stairs going up. My son shakes his head again. “Bad doggie.” I clean up the poop again. Up three more stairs, more poop, only now slightly larger.

I turn to my son and smile. He is laughing. “Bad doggie,” he says.

I get to the top of the stairs and see a buffalo pile of poop. I turn to my son and laugh.

“Bad Alex,” he replies.