Known as:  Black Nightshade, Bull Nettle, Carolina Horsenettle, Nightshade, Deadly Nightshade, Climbing Nightshade, Bittersweet Nightshade, Silvernettle, etc.  Many names and varieties all of which should be considered toxic.  (Silverleaf Nightshade pictured.)
Latin Name: Solanum family (Solanum nigrum, Solanum carolinense, Solanum dulcamara
Poisonous Parts:  Whole plant but berries highest in toxicity.  Major toxin is the alkaloid glycoside solanine.   Combined with other glycosides and atropine produces varied powerful symptoms.
Symptoms: Produces varied toxic effects. Primarily affects the gastrointestinal tract but can also affect the central nervous system.  Signs can include abdominal pain, vomiting, diarrhea, incoordination, weakness, depression, apparent
hallucinations, convulsions, and possible death.
Treatment: Contact your veterinarian.