To [log in to unmask] (Is this a real e-mail address? My answer bounced back) Based on size and that he is a neutered male - our male, Meep, was about that size at 3 months old, and he is on the small size for a neutered male, so maybe yours is a little younger - maybe 10 or 11 weeks? The ferret book I have recommends that they are OK for crunchy food about 12-13 weeks so that would be about right for Wuzzitt. Welcome home to your fuzzie! Karla Meep and Daisy [Posted in FML issue 2416]