Got this info off the net:
The ASPCA Animal Poison Center in Urbana, Illinois says it regards poinsettias as having such low toxicity risk that it doesn't even recommend decontaminatin g animals that may have ingested them. The center says that there can sometimes be gastrointestin al distress from having ingested something alien to the digestive system.
The American Veterinary Medicine Association of America (AVMA), doesn't include poinsettias on its list of plants that are a threat to animals.
Because of the belief that poinsettias are toxic, there are numerous visits to hospitals each year by concerned parents or pet owners whose children or pet have ingested or in some other way been exposed to poinsettias.
A study released in 2000 by Children's Hospital of Pittsburgh and Carnegie Mellon University found that out of nearly 23,000 poinsettia exposures reported to poison control centers nationwide, there was essentially no toxicity of significance of any kind.
We always have Poinsettias around inside at Christmas, and none of our dogs have ever showed an interest in them at all.