cats not getting along

[alwayskisa]

I have two lovely cats. My Sarah is 2 years old, and Ras is her son and 7 months old.
Within the last couple of weeks Sarah has become extremely aggressive towards Ras. She hisses if he gets within a foot of her. He has to run passed her if he wants to get through at all.
I can't pinpoint what caused this sudden change in behavior. She used to lick him and love him!
They are both spayed/neutered.

 

[stephenq]

I have two lovely cats. My Sarah is 2 years old, and Ras is her son and 7 months old.
Within the last couple of weeks Sarah has become extremely aggressive towards Ras. She hisses if he gets within a foot of her. He has to run passed her if he wants to get through at all.
I can't pinpoint what caused this sudden change in behavior. She used to lick him and love him!
They are both spayed/neutered.

Can you think of anything that changed between them or in your home when this started?  Is Ras healthy?  Sometimes a cat may get aggressive towards another when their is an illness present and they sense it.

Two articles:

https://www.aspca.org/pet-care/virt...havior/aggression-between-cats-your-household (has a section on new aggression between cats who were friendly prior)

http://www.catbehaviorassociates.com/cat-fights-what-to-do-when-your-cats-turn-on-each-other/

 

[silmarien]

Your younger kitten is an adolescent now (7 months), and mommy cats 1) become territorial and 2) treat them as an adult, a rival for territory, for awhile.  As long as they don't draw blood, there's no need to intervene if there is fighting/playing.  Let the animals work it out.