i have three rats, i have had more before and i have never had this problem.. my female rat, callista, i got when she was five weeks old. shell be two in july and shes allllllways been a sweetheart. shes always had a great personality and shes never bit anyone, EVER. she just had her second litter of babies about a week and a half ago and she has just gone mad.. she is acting all sorts of crazy and i cant figure her out. i walked up to her cage tonight to get one of the babies [cause she stopped nursing them, and stopped eating as well] to feed them and before i completely make it to her cage she jumped at the door and started whining. it freaked me out cause it sounded like my dog [a rat terrier] but he wasnt in my room.. i leaned down to her cage and she did it again.. as soon as i opened the door she jumped into my lap sniffed all around, jumped in the cage did it again, and she kept doin that til i put her back in.. before when i took her out shed crawl right into my hoodie pocket and sleep.. she is so boney from not eating, and her babies are becoming skinny too.. i didnt have this problem with the last litter, but it really scares me - i dont want something to be terribley wrong.. i mean can rats develop postpartum depression ?