All this talk of animal poo reminds me of something our cat did.
She was an indoor cat, and had a litter tray off away from everything off in the depths of the house. We would see her stroll in its direction, and after a minute or two, once she had done her business, we would normally hear her scratching about while she buried it.
On this one occasion, however, she meandered off towards the litter tray as usual, and less than a minute later she came shooting out at lightning speed, with all her fur bristled (she was a long-hair, so she looked like a pine cone). Her eyes were wide, her ears flattened, and she was absolutely terrified. Both DH and I got up to see what was in there that had scared her. She followed tentatively behind us at a great distance.
When we got there, we couldn't help but laugh. She had done a monster poo. It was at well over twice the size of her usual ones, and was sitting there unburied like an only-slightly-shorter-than-average snake. She must have taken off as soon as she had seen it. Meanwhile, she stood behind us and hissed menacingly at the terrifying poo.
It was definitely toilet humour, but we thought it was hilarious. I never would have expected that an animal could have such a reaction to its own faeces.