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Unfortunately, there is not much that you can do to help them. Cats don't usually need a lot of help. Just be sure to give them a safe place to have their kittens and let nature do the rest.
The one that is leaking blood worries me a little. I wonder if she may have had the kittens somewhere and hidden them and now you are seeing the post delivery bleeding.
Gestation for a cat is 65 days so try to count back from the day that they were outside until now.
Let me know if you still have questions.
When she is ready to give birth, she will "nest" or prepare a place to have the kittens. She may get a little cranky or aggressive. If you squeeze her breast, you might get milk or a clear discharge from the nipple.
The bleeding really concerns me. If she does not have them soon, you really need to see the vet.
Cats are pregnant for 65 days, if that helps any.
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