Headscratchers / The ZhuZhus

• In the episode "Zhu Years Eve," how come the Zhus don't know what New Years Eve is? Have they been Frankie's friend for less than a year?
  • Made even more confusing in the Polish version where they say that the Zhus have been "her friends for years."
  • The same thing also happens in "And the Hammy Goes To" where they have a whole scene dedicated to how they don't know what an award is even though Frankie clearly has a lot of them in her closet.
• What animals in the show can or can't talk and why? While most are not seen talking except for the Zhus, there is a "screaming monkey" in the episode "Friendship Friend-zy" which suggests that the Zhus aren't the only ones who can talk.