Can chihuahuas with short hair have long hair puppies??

I have a little 4 lb short-hair chihuahua and she sheds an insane amount. I have a Furminator, but her coat is so thin, I think it hurts her to use. Literally, my clothes will be covered with her hair after a good pet-lap session. Are there any good and comfortable brushes or devices to keep her undercoat in control? Thanks!

My chihuahua just had puppies yesterday and I am wondering if they will take after their dad (long hair) or mom (short hair). All 3 puppies have short hair but they are only 1 day old so I don't know.

My chihuahua had 4 puppies, the mother is a short hair, the father is a long haired. At what age will I be able to tell if the puppies are going to be long or short haired? Thanks!