Watched the show aswell, thought it was better then most episodes, as for the retrieving part, hunting brant here can be in the same kind of weather. In not so bad waves or calm seas a dog can easily make the retrieves but the waters like that episode I would definitely not want to send a dog out. They also used a boat which is smart but same goes for the dog, it could get pretty scary retrieving ducks against those waves crashing on the rocks. Since the tide is coming in the ducks should float towards the shore but you gotta make sure they're dead. With ducks and brant, if you just wing them and let them land they can dive under water and not surface for a good 30-40 feet, retrieval can get pretty hard if you just wound the birds.