If I owned dogs that did something like that I would definitely want to know. Also, I'm not sure what the laws are in Tennessee are regarding navigable waterways but, if the SoHo is considered a navigable waterway the dog owners could held liable for the damage that they caused to you.
I'm hoping you got your toe checked out to make sure that it wasn't broken. Being wading fishermen we need our toes.
Maybe being a city boy my outlook is different from yours but, from my perspective allowing dogs to run loose is asking for trouble. Dogs when unrestrained can chase people (they probably believe that they're protecting their territory), harass and attack wildlife and other things.
This could have turned in to big legal issue for the owners. I'm just glad that you weren't seriously hurt.