^^^Yes, that is true. According to Gerrold, Heinlein stated that he thought the similarities were slight and stated they both probably owed a debt to Ellis PArker Butler's short story "Pigs Is Pigs" (rapidly multiplying guinea pigs overrun a rail station) and possibly to Noah.
Again, this is according to David Gerrold. I've never heard or read of any other situation where RAH made mention of the tribbles vs. the flat cats.
Sir Rhosis
Again, this is according to David Gerrold. I've never heard or read of any other situation where RAH made mention of the tribbles vs. the flat cats.
Sir Rhosis