Hmmmm. I don't waterfowl much if any anymore. But many moons ago, my dad's lab went out onto sheet ice and broke through. He ended up under the ice with no way up. Had to quickly rescue by breaking ice.
In this, ice near the blind was well broken up. Where the dog got stuck, didn't look like there was much opportunity to get stuck under, so I don't see the dog being at risk. Worst case the dog can't return by getting back up on the ice. As long as the dog doesn't get completely exhausted, rescue is available.
