I would ck that scat and see if it is loaded with fish scales. If so it would be an otter. I was not familiar with otter scat and then I was My first sample was on the pier.
Here's a pic of the scat. It seems entirely composed of crawdad bits...
This one was deposited on top of the dock post which is about 4 feet tall.
My first sample was on the pier. 
