We don't have a dog but our cats WILL watch a nature show with lots of animals, especially birds. They have to hear the interesting sounds first and then they will watch it.
My wife has a DVD or 2 that is nothing but birds and they will watch it. We very rarely get it out so I don't know if it would get their attention if it was used often.
So dog experts out there... what will this channel do that a DVD set to repeat won't?
In broader perspective, this seems to be right in line where everything else is going. Nearly every channel and every show is getting to be the same story repeated over and over again with different locations and actors. Movies are mostly this way too - to the point of trying to bring back ancient stuff. It's starting to feel like paying to breath oxygen.