My cat had 6 kittens the first time she got pregnant. They lookd premature. And all passed away. Now she gave birth to 3 kittens at approx1:30am. They look healthy and are milking. But how do I.know she has pushed all the kittys out. Its been ovsr 16 hours.& still . No mor kittys. Is 3 all.she going to have. Or u think.there's a problen.