I didn't do anything different with my cat apart from getting DF to change her litter for me, Now that Scarlet is here i have caught her in the cot probably twice (bub wasn't in there), Once when she was badly hurt from a dog attack & hiding in there, Other than that she stays away from the nursery all together - I just taught her not to go in there. Babies suffocating from cats are actually very rare & were used as an explanation for SID's way back, Of course it could happen though.