I am very new to this kitten thing. My boyfriend, who has had many cats believes it is. But the tree-hugger in me freaked out when I saw him do it!! I keep reading on the litter bags how bad it is for the environment.
Sorry I can't really help, but as easy as it would be, I don't think I could flush it unless there was some proof its not harmful.
PS I was under the impression that its the litter itself thats the problem, not the "news"??