I was going to say.. the seasons are changing and Im sure he can sence it. its darker earlier now.
but maybe he did eat something that didnt agree with him. Just like people, Im sure they have off days.
Give him a good warm water soak and see how he does.
Awww poor lovely Bob's tummy !!!!! Maggie I can just picture your face when he projectile pooped, poor boy, he must have felt so relieved !!!!! I'm sure he would truly let you know if something was seriously wrong. Awwww Bob, I just love him.