Our dog Banjo has pooped a few times in the last few months in his crate and has been eating it!

We discover this in the morning when we wake up. I did notice he got into a stuffed animal but it wasn't in his poop. I took him out this morning for his poop and it was fine. Any clue as why he would poop and eat it inside his crate? Oh and he seems fine health wise with no visible signs of sickness and has plenty of energy. I changed his food a few weeks ago but he did this prior to that as well.