While pigeons seem harmless, they cause a lot of problems especially on high rise buildings, and these problems get worse as they increase in number, so you should not hesitate to get rid of them once you notice them on your roof or around your home. One big problem with pigeons is that they invade homes in groups. If you notice just one pigeon at the top of your roof, the chances are that they are already many therein. Here are some of the problems caused by pigeons on a hig