all parts toxic. my hens usually leave them alone- last year my idiot cockerel decided to break out and demolish a huge clump of them and was incredibly ill for 2 days after- staggering about disoriented and struggling to find food/water placed in front of him. i had to have seek and destroy mision on daffs after that as he did not learn from it and was determined to go get more soon as was better. chickens are normally fairly bombproof- if it makes a hen ill i suspect would kill a rabbit.