For the past week now in the evenings after dinner I've noticed something strange after Mizu poops. He will poop and his stool is solid. Then the next 2 times w/in 15 minutes he is at it again but he seems like he is trying to push ever so hard and all what comes out is this mushy poop and like watery drips. It only happens in the evenings. In the mornings his stool is also fine and solid. His energy has not changed. What could this be ?? It kinda scares me.