Cannot find if this plant is toxic, anyone help?

We have a vine that is growing near to the bunny enclosure, its called elephant vine as it has large leaves. Bunny cannot get to the leaves but in autumn they drop off and some do go into the enclosure. Bunny would or could have come into contact with them last autumn but the vine is growing nearer to enclosure so more are likely to go into enclosure. I know that usually bunnies will not eat toxic plants anyway as long as they have enough other food but I cannot find any reference on google to elephant vine only elephant ears plant that is totally different.

anyone know anything??

I don't recognise the name- could you get a photo? xx

Ive searched the internet but couldn't come up with anything.

I will register with photobucket so I can post picture.