I don't think a mother could do that unless she delivered with the cord still attached to the placenta.
Newborn Kitten Umbilical Cord Infection
Images. Infected umbilical cord stumps are rare. But sometimes an infection can develop.
SHELTER SUNDAY: Meet these hound mix puppies and this ... from c1.staticflickr.com
Omphalitis is a potentially serious infection of the umbilicus. I don't think a mother could do that unless she delivered with the cord still attached to the placenta. After birth, the cord is no longer needed.
Is my new baby eating enough?
If you end up under suspicion of drug use & i am asked to evaluate a newborn for such issues, i. Newborn kittens umbilical cord still attached? Watch the umbilical cord stump for infection. This might be a sign of an underlying problem, such an infection.