my cat is a cannibal, SOS.
as you read in the title I'm very much not joking, please read this carefully because I'm going to describe how the incident went.
I'm a cat owner that's been raised in a household that always had a couple cats around, so I know how to take care of cats and how to raise them healthy and normally.
a few months ago around february-march I was in school and a cat was walking around the hallways, she looked like a siamese cat and she was very much scared and soaked and skinny. I skipped a few classes to stay with her and ended up taking her home with me at the end of the day.
she's around 9-10 months old I'm pretty sure and she's had the same diet as the rest of my cats, cat food mixed with tuna. so she's pretty healthy and doesn't really have any issues or complications of health.
today, I let her out of my house when I went to school for my final exam, she's not strictly an indoor cat and she always comes back home around noon. when I was walking back home though I saw a cat and I recognized her as my baby (her name's rain) when I went to grab her and got closer, I realized she was eating a kitten, obviously I screamed at the sight and tried to get her away from the corpse but she bit into it and ran.
she came home later on like usual, I'm scared for my other cats because I have kittens around the same age as the deceased one. I'm confused why she would eat another cat when her diet is pretty good for her weight and I'm very worried what if the kitten was sick and she's going to get sick too.
I told my mom and she said she'll take her to the vet on the weekend but I'm scared, is this normal behavior or do I have to do something? what do I even do in this situation?.