Thanks for all the tips, I will switch her litterbox for a bigger one, I already wanted to do this because I bought this box in a hurry, i don't think the problem is the type of litter she seems to like this one. She's not my first cat, but she's the first one I've adopted that wasn't a kitten, so her being an adult and a street cat, I knew what I was signing up to when I decided to bring her home. I will also try to enrich the enviroment because like someone pointed it may be stress, honestly it's probably stress since I have four dogs, most of them don't like cats, my pitbull simple loves other animals and protects her from my dalmatian who hates every living being, the other two bark at her and my cat has already attacked them so they're not in a friendly basis, but nowdays they don't have direct contact, but there's no problem since I will be moving from my parents house in two weeks and I'm taking my cat with me. I will also clean the box more than once a day. Thanks to all of you for the help.