Bearclaw Valley i recounted the memories

All of the talk of poisoning - of eating poisonous herbs on purpose in order to try and become immune - was almost sickening. Evien felt his stomach churn uneasily and pressed his ears back to his head. Memories of vomiting after every meal, of being too weak to hold his head up, of his mother's coddling after, popped into his head. 

"I don't know any plant that you can get used to," he responded, far more calm than he felt. "You're far more likely to die if you try something like that, and I don't want to put our packmates at risk like that." Toxic blood? That would put everyone at risk - not just them.