We have two cats, Jade and Harold.
I brooded some chicks in the garage with a heat lamp in a kiddie pool. Despite me being very careful, my DH let Jade into the garage and she was in with the chicks all night.
The chicks in the kiddie pool were fine, she would watch them but do nothing, but two got out of the brooder and she 'informed' me that that made them fair game. She ate them.
Jade is unusually intelligent, she knows the chickens are ours. I've seen her leap six feet into the air to bring down a dove next to one of my bantams. I also have caught her 'feeding' mice to the hens. (She catches them, then walks to the hens and drops it for them to eat).
Harold is much more 'normal'. He stares and STARES at the chicks, but runs away if I notice.
That being said, I keep my chicks in one of those bigger covered pet rabbit cages from
Petsmart and the worst the chicks get is little furry faces watching through the bars
.
ETA: spelling