She says "that was So boring" to every toy I get her! Any suggestions?

...solid gold? :S jeez, that's rough!

If it helps any, you can buy a minion - that usually keeps their mood maxed 24/7

Your Pet doesn't want to play because its happiness is at its highest level already. Remove the Minion from your Pet and wait a few hours and if you are lucky the happiness level should drop. Also make sure that your Pet isn't in a Resort (Veta Lake, Omen Islands) because those will constantly keep it happy and bloated, too.