It appears to be EXTREMELY high in phosphorus and very low in calcium. And I havent a clue if its toxic for reptiles or not. But just because the phosphorus is so much higher than the calcium, I wouldnt recommend it. en.wikipedia.org/wiki/Wheatgrass
I'm with Jennifer. It's high levels of phosphorous will completely throw the the 2:1 Ca: P ratio out of whack. This is also why we feed banana only very rarely...such as once to twice a month and only a bite or two.