Is my hamster pregnant

Question
Dear Katie,
I have an almost one year old dwarf hamster, and she has been acting pregnant for about 5 days. The thing is is she has not had any male contact evr since i bought her areound five months ago. She has been showing all of the symptoms of being pregnant, she  has been making numerous nests, hording alot of food, and she has gotten really fat. I dont know if she could have been pregnant before i got her and could not have given birth and she is pregnant now or what. Please tell me if she is pregnant or not as soon as possible,please.  

Answer

  She can't be pregnant. If she hasn't had any contact with a male in five months there is no way she can be pregnant. When my female hamster got old she did the same thing. If she was pregnant when you bought her, she would have already had the pups.

Thanks for writing