The cats got a gift today from someone I work with. Oh yes, it's catnip! Animal has experienced it before, Custard is too sophisticated and Triscuit, well, I think she's a fan!
Maybe Custard doesn't like the silver vine. A lot of cats like both silver vine & catnip, but some only like one or the other. I had a cat who couldn't care less about catnip but went crazy for the vine but her brother seemed put off by it.
You are right. Custard does have a little pink mouse full of catnip she got when she turned 6 months old and she loved it. Same with Animal, he's got a blue one. Triscuit is the odd one out! I'll have to get some normal catnip now to make sure it's not just Custard being jealous of Triscuit for something else.