At first when I got my chicks, my 3 cats were very very very curious. I have a 20lb Maine Coon cat, and 2 Cornish Rex cats. The Maine coon didn't care TOO much, as he's always been exposed to all kinds of different things, but he sat and watched. Then got bored, and was like "whatever." I made sure to have my chicks in a secure brooder though, especially for the Rex's. They're both 2, and they're permanent kittens. I knew they wouldn't stay away- so I let them peek and got pecked, one hid on top of the refrigerator for 2 hours, and the other stayed away. Then once they got more used to the chicks, and everything- as I kept getting more, Im finding they don't care so much about the chicks so much as the brooder lamp. They're like lizards, and try to bask in the light. When feeding the chicks I left the top open, for literally 2 minutes- walked away, and came back to one of my cats sitting INSIDE the brooder with the chicks. He didn't care about them, they however we're seriously offended and mad they invaded their space! Im afraid I'm going to have to leave the lamp set up once everyone is outside, for the cats! I know my cats. I don't know how other cats would act. As far as mine with chicks.. I trust them... through a secure brooder. They still have a wild streak, and instincts do kick in. You just have to make sure they can NOT get to the chicks, even if your kitty is a lump, and "would never do that". I do know that cats don't like closed doors, and once a door is opened and they get a peek at whats inside, they'll never leave it alone! So I'd say.. let the cats see, but not touch.