The garden approach has the best results, but I don't garden so back into the pond they go. I also don't swim in the pond regularly either. If swimming were to be planned in the near future I would avoid throwing remains in just to eliminate the possible encounter. The few turtles I have, and the raccoons, will make short work of any offal left in the waters. No to mention the benefits to the stocked fish and pond critters.
The only real concern I have is the dog bringing something smelly back to the house.
