I'd add.....
The reason Pete left skid marks in his wet suit over "encountering the seal" was because he saw it and that startled him....if he hadn't seen the seal and had just "bumped" something then I'm sure he would have still been startled but he wouldn't have surfaced claiming "I was bumped by a Monk Seal" no matter how big his saucer shaped eyes were...
In the dog story the owner didn't indicate there was any bite or damage from the encounter, and its pretty clear from the pictures that whatever the dog "bumped", or was "bumped by" he didn't see.....so with no damage, and no evidence beyond the "I'm sure" statement of the owner, to me its just as easy to imagine that the dog cramped up, or maybe even had a Chocolate Moment as it is to beleive that "it was a Seal bump".....
Again not saying that it wasn't a Seal bump just that posting a picture of a Gray Seal in Norway feeding on Summer Eiders and then a swimming dog with a look of panic on his face doesn't prove that it was bumped by a Seal.....
As I've said before, "in my experience", and this includes more retrieves, and with multiple dogs, both mine and guests, I've never seen a seal do anything but look at a dog.....doesn't mean that the next retrieve won't end in disaster just that I don't believe dropping a bird and looking scared proves anything.....
And if that means I'm a skeptic, a Grinch and don't believe in the Easter Bunny, Santa Claus, and Peter Pan well I can live with that.....
Steve