Whitey hasn't gained any more, but 13 lbs 12 oz is still a little high for him. Billy is up a little, but right where he should be at 13 lbs 8 oz. We are attempting to cut Whitey's food while keeping Billy's the same. Wish us luck! Our best hope is that both boys eat their wet food so fast that Whitey won't have a chance to raid Billy's. We'll see how it works.
(Theoretically we could feed them in separate rooms. Since they've been eating together since they were kittens, though, we want to avoid changing the routine if we can.)