My boys love the nip! I am not sure Pea-Pea really knows what to do with it, so thinking perhaps she is one of those cats that just has no interest in it. She sometimes acts like she does, but not sure if she's doing that because she likes it, or because the boys like it. She's weird that way, lol. Maple, who's almost 16, also enjoys it. She'll guard the catnip toys though sometimes and if anyone comes by, growls at them.