The water doesn't need to be super interesting. It's how you use it that's important. If you have water that allows for re-entries, odds are that you can use it "right" or "wrong".
In this example, you would want to run the yellow lines with a dog that tends to go fat.
The red lines, would be for a dog that tends to cheat, or go thin.
The water is nothing special. It's just about how you use it.