In a possibly related note, this week I noticed that when I use my Echo Dot to change my Wally to channel 245, Alexa no longer identifies that channel as "Fido TV" but instead now correctly identifies it as BUZZR. Could Alexa have updated the guide listings to remove any reference to Fido TV since Dish is actually going to be adding the competing channel DOG TV? Nah, it's probably just a coincidence.
I’m not sure about other devices, but I happen to know that DOGTV is available on Roku! I haven’t looked lately, but I believe there’s a free version and a paid version. They also have other channels for dogs as well as even cats.