I have a tall bush growing along my fence in my backyard that grows these small red berries every summer (picture included). Each berry is about half the size of a pea. I always see birds swooping down to eat them, so I was wondering if they were safe for my hens. I'm not sure what type of berries they technically are, but I've seen them in places other than my backyard, so they must be relatively common. Any ideas...?