Oh wow.. I will look into to this. He's been on it for the last 5 months, as a recommendation from his vet and one of the techs who has a bully. Reading your link now :(
So glad he's ok, and good think you noticed it before he got too far! My little one probably would have tried to make a game out of it and started running.
If only I could get him to sleep in the bed with us. We tried a few times and he refuses to sleep. Just runs around the bed and bites "objects" under the cover :(