Angel is around 6 years old and we've had her 4 years. She was the sweetest, most loving cat I ever met when we got her. She'd clean. Peanut and snuggle any of her humans that were sad.
We took at least a month to slowly introduce them at first and they got along very well. Then 1 year ago they were both laying on my bed when Angel freaked out. She started hissing out of nowhere and attacked Peanut. We kept an eye on it for awhile and finally had to lock Angel up because she was keeping Peanut cornored in the basement. It took 2 months, but we finally reintroduced them.
Occasionally Angel will still attack Peant out of the blue but by the next day (2days tops) she's fine again. It did take about a week after Peanut visited the vet.
Two nights ago she attacked Peanut because he wouldn't play with her. Next day she was fine until night time. Peanut jumped on the couch for our nightly snuggle and Angel hissed at him. I left the room and heard a horrible screaming and hissing fight. I found Angel cornering Peanut in the basement. When she seemed calmer I tried to pick her up. She ran and hissed at me a few times (that was new). Eventually she hid in a cat toy. When she relaxed I reached in, and rather than run out the 2nd entrance she started screaming, flipped on her back and clawed me like crazy.
The vet has done blood work twice and it's all normal. Sorry this is so long but I wanted to include everything. I'm getting scared for her to be around my kids, and Peanut is just not the same. I love her so much. Does anyone have an idea why this woyld happen 3 years after we got her?