http://www.poultryhelp.com/toxicplants.html#CI am so glad you reminded me about this. The lady at Flowerland told me that only the blue ones were poisonous, but I meant to check up on it when I got home and forgot. They are Ipomoea coccinea and evidently all of the plant is poisonous. I will be yanking them out for the sake of my chickens and 3 & 5 year olds. Does anyone have suggestions of a climbing vine (non-toxic) annual that will grow quickly in full-sun, hot sandy poor soil? I want something along the back of the run to help with the heat but there is a line above so I can't plant any trees.