I have 2 Tabby cats. One is 15 years old and other events is 3 years old. We are building a large addition onto our home. We just installed new carpeting throughout the additionight a few days ago. Since the carpet has been installed, we are finding a new pile of feces every morning. We don't think both cats are doing it since there is only one new pile each morning. Is it common for cats to confuse plush carpet with its litter? We aren't sure what to do and are freaking out that our brand new carpet will be ruined!