Today I gave my russian tortoise Baby Bok Choy. I read that it's okay in small amounts but I'm worried he's allergic! He ate a whole leaf, and started rubbing his nose with his feet and made funny mouth motions (kind of like a yawn? he has nevr done that before??) didn't want to eat anything else?? I soaked him hoping he would drink, and he stopped after a few hours, but is this an allergy? Is it dangerous?