I hope this means they are getting along tolerably, if she has access to his room.

I agree the best bet might be to leave the light food down during the day if she is a grazer and doesn't do well without food out at all times. It won't hurt him to eat it if he is an adult (year or so old). Kittens have different nutritional needs than cats if he is younger than a year (I can't recall). You can feed him separately when you are home if you want him to eat a different food and monitor so she doesn't eat it.
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Tammy and Pookey
(Stanley 8/91 - 8/07)