When I bought the Kong Wubba (to replace the one Cooper had destroyed) and the Beanie Ball, I also picked up a Round Hound (I think it's made by Kong), supposed to be "3X stronger!!!!" Wooptie doo, it lasted about 15 minutes instead of 5. They described the toy as being strong because it had a layer of canvas under the fleece-type material. The canvas was there but it was paper thin. The beanie ball is still a hit today and showing no signs of wear yet. Kong is still going strong, of course. Everything else made by Kong that isn't made out of the kong rubber hasn't come even close to measuring up to the Kong name
Edited to add
I agree if you're going to write it, I would write it from yourself. A smaller local company might appreciate the cuteness, but I'd doubt a larger company would take the letter seriously if written from the dogs perspective.