That's what I thought, 'rude!' And very very disgusting.
There is a possible backstory, but if it's not just coincidence, it means that I have a very very malevolent fox visitor!
I used to use plastic bowls, and they kept either disappearing altogether, or appearing in the middle of the road. I realised that foxes love plastic - anything plastic I leave out in the garden is re-located and left in a chewed condition.
They also bring chewed-up plastic items from other people's gardens - toys etc.
I replaced the plastic bowls with a sturdy metal one, and remarked the other day that the metal bowl is obviously less fun to pay with than the plastic ones, because it has stayed put, and I thought 'aha! outfoxed you, foxes!'
So the Conspiracy Theory version is that the foxes heard me gloating about having deprived them of their fun with plastic bowls, and exacted their revenge this morning by pooing in the metal bowl...
Surely not😧