We have 3 female cats. Our 2 cats, Margo and Edith, are now 3 years old and grew up together. Gwen is the 3rd, a kitten we rescued a few months ago. Gwen is not yet spayed but she is peeing on things throughout the house and causing Margo to mark her territory. I am here to get help with our situation and resolve the peeing and behavioral issues.