pregnant piggy

Question
my guinea pig is pregnant. my question is why is she so grumpy.my other guinea pig was so sweet while she was pregnant,but not kasey, she nips at me while i am holding her and she chatters her teeth at me, why is she doing this?  

Answer
Nancy,

Each Guinea Pig has a different personality and temperment. Some Guinea Pigs are sweet when pregnant and others are crabby when pregnant. Some Guinea Pigs just don't like to be held as they get closer to their due dates or just don't like being held while pregnant it just depends on the nature of the Guinea Pig.

I hope this helps,
  Take care,
    Jules