Pregnant cat aggressive to older kittens. Will she change after birth?

Sannu is probably close to giving birth, and she can act aggressive during this time. You need to put Sannu in her own room with a birthing box, food, water, and cat litter. She needs her own space as well as peace and quiet. Do not let the other kittens into this room until the kittens are at least 4 weeks of age.

Yes, it is normal of a mother cat to be protective of her unborn kittens. I would keep her previous litter away from her until after her new litter is at least six weeks of age when they start weaning.

Hello. Unfortunately, this is not a friendly family group. Cats do not often form strong bonds with their offspring & she may be feeling a little threatened by having them around as they get older. It may be a good idea to either find homes for the kittens, or consider spaying the mother cat. This may alleviate some of her anxiety. Hopefully, things will even out for her soon. Thanks for contacting Petco Pet Education Center, formerly Petcoach.

I would recommend waiting until your female cat has had the kittens before really changing anything. IT is possible she is protective and unfriendly to the other cat due to being pregnant. You can get feliway a cat pheromone to help decrease stress in the house. Also, you can try to increase litter boxes and areas of elevation to help calm the two cats. I hope that helps

Hormonal changes can definitely cause changes in behavior such as what you are describing. It would be best to keep the male separate from the queen, especially if she is already acting aggressively toward him. Once the kittens are born, the queen will likely get even more protective, which could result in injury if you leave the cats together.

Yes, he can harm the kittens. Some tomcats have attacked and killed their own offspring in order to get the attention of the mother cat, and bring her back into heat so they can mate again. Since you have a single bedroom, I would keep Ash in the bedroom alone and do not allow the male cat in with her or the kittens. Best sure to keep a litter box, food, and water in there for her. If that truly won't work, I recommend having him staying somewhere else during the first couple of weeks of the kittens's life to prevent him from hurting them. I hope this helps.

Changes in the social structure in a household like this can be very stressful for cats. They are not a very social species by nature, and it's often very hard for them to accept "newcomers" - even if these are her sister's kittens. I would recommend making sure that the aggressive cat has her own area where she can get away completely from the kittens and your other cat whenever she wants to - this should be a comfortable room with a litter box, food and water bowls, a cat tree or other resting spot, etc. This way, she can be on her own if she prefers to, but can still come out an interact with the other cat and her kittens if she chooses. Feliway diffusers in the areas where she spends most of her time may also help to reduce her stress. It may take her weeks, months, or even longer to adjust, so be patient - some cats never really adjust, unfortunately, and may need to be kept in separate areas of the house to keep everyone happy.