my ig has started to poop in his cage on his branch, he has never done this he always goes in the water at the bottom of the enclosure, now heres the thing the only time he poops on the branch is wen he has been wandering around the house or garden, he will go back to the enclosure on his own then climb to the top then poop, not a solid poop either a runny one, anybody have any ideas why he does this?????????