are christmas cactus plants poisonous to dogs

Yes, Christmas cactus plants are poisonous to dogs. The sap of the plant contains a substance called saponins, which can cause vomiting, diarrhea, and other gastrointestinal issues in dogs if ingested. It's important to keep Christmas cactus plants out of reach of dogs and to supervise them when they are around the plant. If you suspect your dog has ingested any part of the plant, contact your veterinarian immediately for advice.