There are very few products especially deer feeder products that are available are designed to prevent a bear inside it, fortunately bears tend to feed at night, whereas our Daytime Deadfall Feeder closes at night and can prevent bears from getting inside of it. With that being said, The Daytime Deadfall Feeder is not absolutely bear proof. If you have a heavy bear population in your area there is a chance that bears can tamper with feeder.