Nor is there any evidence that the agency had any requirements for defining acceptable toxicity levels in the industry - provided data. (scientificamerican.com)
Your dog's prognosis will depend on the amount that was ingested, the size of your dog, and the individual toxicity level of the plant. (wagwalking.com)
As far as toxicity levels go, I haven't been able to find any hard facts. (zephyrhillblog.com)