Think I've probably ran into two dozen dogs while out fishing in the last year and can't think of a time when any of them were a problem. Most stuck close to owners and all but one stayed out of the water.

My favorite wandered by, don't know who he belonged to. Big Rott, feared for my life at first, but he turned out to be shy. Took him fifteen minutes to get close enough to pet and then sat down and leaned against my leg and watched me fish for half an hour. I wasn't catching anything so he finally wandered off and I never saw him again. Like a setter who gives up on you when you can't hit anything.
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Don’t attribute irritating behavior to malevolence when mere stupidity will suffice as an explanation.