My Little Stray gave birth the afternoon to 5 kittens, I think she is done. The first was born about 3 hours ago and I need some adivise. They all seem to be doing fine however, they all still have their embilical cords attached. Should I give her more time or should I do something??? Please let me know asap, I dont want to wait too long and jeapordaize the kittens health.