Feeding wild birds does carry potential risks. Birds may contract and spread disease by gathering at feeders; poorly maintained feeding and watering stations may also cause illness. Birds at feeders risk predation by cats and other animals, or may incur injury by flying into windows. Steps should be taken to reduce the risks to birds, such as: regular disinfecting of feeders and watering stations, ensuring feed has not become moldy or rancid, and proper positioning of feeders to reduce crowding and window collisions. Birds are less likely to fly into windows that have a wooden lattice. Collisions with windows can also be reduced by using window decals.