Originally Posted by
joypulv
I don't know anything about Persians. I found a site that mentioned nostril constriction (because of many Persians having such compressed faces) and then proceeded to go into detail about every other condition except that one. So I have no idea if it's even serious or not.
The first thought that entered my mind was that the mother cat, a dog, or a human (adult or child) has been breaking the kittens' necks. A floppy neck is a sign of a broken neck. But then I decided that was too far fetched and looked for disease and congenital conditions.