I cut my teeth hunting Skagit and Padilla bays up in Washington. Lots of great tips here especially on the risks to dogs. My first lab couldn't be called off a bird, and many times he would disappear chasing a cripple. We were hunting from shore without a boat. My next lab I made sure I could call him off. But in the wind it's hard for them to hear. I would say don't send the dog until you are certain those cripples are finished. Many "dead" birds get very much alive when the dog is twenty yards from it.