huh? My grandma from a little peasant European village in the mountains and now long dead,
warned the family about cats and babies.
Well I never heard of it, so I just googled it and about all I can find on it is it's an old wives tale, including from Snopes.
I even googled "are there any confirmed cases of a cat smothering a human baby." Goose egg on the results. I suppose anything is possible but so is lightning striking a tree and throwing it uphill into a babies crib room.
I also googled "are there any confirmed cases where a pit bull has killed a child." As you could expect there's link after link of headlines. I quit after scrolling through 10 solid pages of results.