Lots of cat owners get rid of their cats due to problems related to urinating in the house. The truth is that the majority of them could have been retrained with a little effort on the owner’s side. Your cat is not spiteful; they simply don’t know what spite is so they aren’t doing it because you changed their brand of cat food! Cats that stop using a litter box are doing it for a reason.
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How to Stop a Cat From Urinating in the House

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Hi, I recently got a new cat, who is about 4 years old. I have two cats before I brought her into our house. The older cat of the two is rather aggressive to the new cat. I know she feels threatened by her. The cat that has been here has started to pee outside the litter box. I clean it out everyday. But it has not helped. What do I do with this situation? We love all three cats. I just them to get along and have peace in my house.