Just a few minutes ago Fish came over to play with Fred. All evening he's continued to hiss at her at every approach--the smell of the vet hospital (imperceptible to me) was really long-lasting.

Whoops, one more growl. Maybe that was "Kitten, you're a pest" and not "Who are you, you smell funny."

Agatha has used the funny smell to re-invigorate the hissing she never completely dropped. I think she, a natural beta, is trying hard to retain seniority over the newcomer. So far it's working...