Mom cat being extremely aggressive towards other animals

Okay I've had my cat lucky for about 10 years, hes a sweety and has no problems with other animals. Then we got a new cat named zoey who had been in a hoarding situation but is so sweet to humans, we were told she was fine with other animals as well. But if lucky got too close, she'd attack. Within a week of getting her we realized she was pregnant. She had 5 kittens and will be spayed as soon as its possible. But now she will search out lucky and attack him. He could just be sleeping somewhere and she will find him and scratch him across the face. He has no interest in her kittens at all, doesn't go anywhere near them. She's a sweetheart to us and an awesome mom but its not fair to lucky to be attacked for no reason and I don't know how to fix this. We're hoping she'll calm down when the kittens are older and shes fixed but if not my mom said we have to give her up. She's just so lovable to humans and I don't want to just give up on her and if we do have to give her up I'm scared the same thing would happen somewhere else and she'd end up being put down for her aggressiveness. Any advice would be appreciated

Oh also she was pregnant before we got her, we just didn't know. Lucky is fixed.

The current aggression is almost certainly linked to Zoey being protective of her kittens. The best thing you can do is give Zoey her own space (maybe a room of her own), and keep her and the kittens totally separated from Lucky. As Zoey's come out of a hoarding situation, she's likely to be ultra sensitive the the presence of other cats and the possible threat they pose to her and her young family.

Once the kittens are older (maybe fully weaned) and Zoey's feeling more secure and settled you can begin the introduction process. Cat to cat introductions typically take weeks or months, so be prepared to be patient. The key is to always let the cats dictate the pace. [article="32804"][/article][article="32680"][/article][article="29726"][/article]