and produced guidelines on what dogs like in a tune. >> which were keep it below middle "c," piano, harp, vibra phones. nothing to piercing. >> reporter: think brahms, not tchaikovsky. does it work? >> can't tell if they will be touched by it. all i hope for is they don't run away. >> reporter: we borrowed the dog, tail-wagging, licking. she seems happy. nick watt, abc news, los angeles. perfect. >> who knew, dog tv costs only $4.99 a month. you can stream it online for $10. >> great idea. i don't stream that. i do watch dogs in my spare time, apparently. >> how do you keep them happy? >> i leave "world news now" for them. that's perfect. and they love polka music. >> theme music of "world news