Will my grandmother cat be aggressive with her grandkittens?

She is likely to become more protective when the new born kittens arrive and it is unlikely she will become more accepting of the older kittens at this stage. Ensure she has a quiet area to have the new kittens undisturbed y other cats (including her previous offspring)

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.

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.

Your granny sounds very sweet! Don't worry cats are very good mothers and do very well to look after their young. You could certainly put a blanket down for the kittens though. Just keep an eye that mummy and kittens look healthy. I would consider getting the kittens neutered in a few months to avoid breeding.

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.

Cats are not naturally sociable and it is not uncommon for mothers to reject the kittens beyond puberty. It may ve worth considering segregation to different parts of the house or even rehoming one if very aggressive.. Pheromone products and calming diets or supplements can help in less severe cases

I'm very sorry to hear about the loss of your hamster. Hunting and killing rodents and other small animals is completely normal behavior for cats, and has nothing to do with any type of aggression towards humans - so there is no reason to think that she will have any issues with family members based on this incident. It's also very common for cats to eat small animals that they have killed (such as mice, moles, chipmunks, etc.), so I would not expect this to cause any significant problems for your kitty.