I only have daylilies in my yard, nothing in the true lilium family. I let my cat outside only while I watch him within that yard, and a few days ago I woke up to find him with an elevated heart rate, glazed eyes, and drooling. An hour later he was better, and I had a vet run blood tests. The tests showed his kidneys and liver were fine. So maybe I got really lucky and he only chewed just the tinest bit. He often chews on the grass growing between my daylilies, so I feel the daylilies must have been the cause.