We've got two cats and they weren't really interested in the baby when he arrived. When we were setting up the nursery, we just let them have a bit of a sniff and then kept them out of there if they got too nosy. They've never jumped in the cot. We've had one of those nets around the cot too, but found they never tried to jump in. The only time they go in DS's room now is to sit on the window sill in the morning cause it gets the morning sun.