If there is a visible split in the roof of the mouth or the soft palate.
If it is bad then it will look a bit like in the photo , also if the kitten dose try to feed , then sometime's you will see milk coming from there nose.
If i was you then i would not try feeding the kitten A/D at only five days old , some breeder's may and maybe it can help , but i would just keep trying milk
If the kitten dose have this bad , then the best thing for the kitten would be to be put to sleep , sorry

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