My 4 month old female puppy and 4 year old male neutered cat have become very different with my queen (pregnant) cat. My puppy will try and chase her all around the house and she does not like that, they used to get along pretty well until a few weeks ago. My male cat is down right mean to her, they used to share food/water dishes and a littler box but I've had to buy her all new things because he won't let her go near the original ones. And he attacks her whenever he sees her, biting her neck and back. Is this normal? She now keeps to my basement or bedroom but that could be because she's due any day now.