I just recently started taking my golden swimming at a pond for dogs and I stick with him like flies on poop. If he is in the pond I'm in the pond. The only two problem dogs I have seen there so far were 2 GSD's. They should not have been there, one was a resource guarder and the other was stalking the dogs. The owners thought the behaviors were ok...I didn't and I kept my boy far away from those 2.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD