After How Many Minutes Will The Newborn Kitten Start Breathing After Birth?

It better start immediately or its not going to make it. You can cup your hand over its mouth and nose and blow into it trying to get things started but it should really have started immediately.

The baby kitten should start breathing right away after the mom cleans off the sac and if it doesn't you should either try breathing very gently through mouth and nose or rub the kitten to get it to start breathing immediately. And sometimes they are just to weak to survive in this world and you just have to let go. I have had to do this a few times and it is sad but there is nothing you can do about it.

They should be Abel to breathe right away take your cat to the vet