Poisonous Plants of North Carolina
Cornell University Plants Poisonous to Livestock
University of Pennsylvania Poisonous Plants Database
Plus, none of the lists specific for dogs (Humane Society of the United States, the ASPCA and Doberdogs) that I found has it named.
Here is what Delena Tull in Edible and Useful Plants of Texas and the Southwest says, however, about eating American beautyberry:
"I have found several sources stating that the fruit is safe to eat, and several stating that it is inedible....I have talked to one woman who reported feeling slight nausea after eating beauty-berry jelly. Personally, I discourage its use for food. The raw fruit has an unpleasant flavor."
Since it isn't listed on any toxic database, I wouldn't think your dogs would be in any danger from eating a few berries. They probably aren't something the dogs would like to eat anyway and you could always remove the majority of the berries from the bushes if they do seem to be interested in eating them.
