I think my cats know One of them has had babies herself a few years ago so sometimes it feels like she's looking at me and saying "Oh I know what that's like"

A few months ago I started putting the nursery together and if the animals (the two cats and dog) try to come into the room when I have the door open, I growl at them. The dog knows to stay out but sometimes the cats can't resist and try to sneak in when I'm not looking. I think we'll put a screen door on the nursery. Luke wants me to just put the cats out but I'm not keen on that at all.. they're my babies and not to mention we live near some major roads.