Is this safe to eat

[decoman11]

So I recently cleaned my russian tortoise cage and I then went in the back years to
get some leaves to make a little cave for him cause he loves caves and I found some really large grape vine leave ( I don't know what species or grape but they use it to make wine) so I grabbed a couple of leaves and made a cave now he is eating the cave my question is are these grape leaves poisonous to my tortoise

 

[Yvonne G]

Grape leaves are very nutritious for your tortoise to eat.