Teaching dogs to recognise written commands

http://www.theguardian.com/technology/2014/mar/21/how-to-teach-your-dog-to-read-ipad

Well, that's just very odd. I think I'll stick with verbal and physical commands.

Yes, I'll stick to word commands & hand signals!

Good for a party trick, I suppose, or for demonstrating training. It might be something I'd teach to a breed such as a collie, as they require continuous training to keep them mentally active.