mouse chirping noise

Question
When I hold my mouse, she makes a chirping noise. What does this mean?
Thanks you!

Answer
Dear Jess,

Mice actually 'talk' all the time, only usually it is so high-pitched that humans can't hear it.  When a mouse has had a mild respiratory infection/cold at some point, often its 'voice' is lower and we can hear it.  Some mice 'chirp' all the time; others only when they are excited.  She is talking to you.  I rather like it!

squeaks n giggles,

Natasha