I did not know about the pathway..thanks for that. And I glad to hear your girls have done well for 6 yrs on roundup ready grain. I respectfully disagree with the statement that it is not toxic due to lack of shikimate enzymatic pathway in mammals. There are acute toxic effects due to the surfactant effect while spraying if inhaled leading to respiratory distress (like most chemicals), albeit a low chance of eventual pulmonary fibrosis with repeated exposure..quantity and time. If swallowed or ingested, however, glyphosphate is acutely toxic leading to increased salivation, esophageal inflammation, nausea, vomiting and so on, increasing chance of aspiration pneumonia and possibly drowning in ones own secretions. Personally, if I use glyphosphate I do so early to mid-day to allow proper dry time and do not let my pets or children out to the area for 24 hrs. I avoid evening spraying because, in my climate, we get dew most summer days and that would not allow the product adequate time to dry.