My dh thinks it's a cat but I don't think so, we own a cat and her poop has never looked like this.
It's like black oil and it's spread all over the place like an animal has the squits and is just pooping as it walks.
This has been going on since August, we've even used tiger poop but it doesn't seem to make any difference.
Another clue is that there is a vennel between our and our neighbours house. The poop goes all the way through this. There is a gate with a gap about 2.5" high below it. I don't think a cat could fit under this. Also cats don't tend to poop on concrete and this is all around our front and back door and through the vennel.
Any ideas?
Oh, we live in the city, I guess it's quite suburban though and loads of woods and green spaces near by.