One topic cable channels simply run out of material over time. There are only so many times you can watch a wildabeast get eaten by a croc on TV without it becoming ho hum. It would still be awesome to see in real life but there are only so many ideas for these one topic channels. Look at the Sci-Fi channel. They have been reduced to producing some of the worst sci-ri of all time because they have been running it 24/7 for years. They should of had 5 or 10 year run then the network should of switched to something else. If there's anything left that they haven't made a network or show about.