Mandevilla Vine toxic?

[Nslangton]

I want to grow a mandevilla vine on part of my run and have read conflicting reports. Is it toxic? Some say yes others no. So which is it. I don't want to harm my hens, but I want their run to look beautiful. Thanks

 

[Poppycocks]

Same question. Making a play area for them and us where two white Mandela are growing.