The venom can kill dogs and cats. It can also cause temporary blindness and excruciating pain in people if the poison gets into the eyes or mouth.
VOA: standard.2010.02.07
But cheaper is not necessarily better if the test comes up snake eyes for high risk for Alzheimer's, Huntington's, diabetes, cancer, depression orblindness for you or your children.
If 20 years later the family gets a more plentiful yet still poor diet (with a lot of calories but not many micronutrients, such as iron or vitamins) she will become overweight or obese, while her children will suffer nutritional deficiency, such as anaemia orblindness.