Supplemental feeding - the pros & cons. First thing you need to do is check your local/state regulations on providing supplemental feed for wildlife during the winter months. With the threat of orally transferred viruses and diseases, some states have outlawed this practice. If your property's region is allowed to provide supplemental feed during the winter months, there are a few things to keep in mind... What food sources are helping deer vs. potentially having a negative impact on the deers h