I was potting up a few peace lilies (Spathiphyllum hybrid) and I went inside for a bit and came out and my hens were going after the houseplants. Apparently they contain oxalates. I have five hens, all two years old. Does anyone have experience with this? I'm pretty sure each bird ate some (mob mentality) and probably got ten bites each, perhaps more. Is that likely to kill them? When should I see symptoms? How long should I worry if nothing seems to be happening? Thanks!