If mom isn't around to nurse them, they'll need a human to step in and provide them with formula. Pet supply stores sell kitten milk replacement formulas, which come premixed in canned or powdered form. The powdered form must be mixed with warm water according to the manufacturer's directions to prepare it for feeding.
The noun NIT has 2 senses: 1. a luminance unit equal to 1 candle per square meter measured perpendicular to the rays from the source. 2. egg or young of an insect parasitic on mammals especially a sucking louse; often attached to a hair or item of clothing.Familiarity information: NIT used as a noun is rare.Dictionary entry details.ypernyms (nit is a kind of...): egg (animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes; especially the thin-shelled reproductive body laid by e.g. female birds).
In the UK, the National insurance number, or NI, is a number that  is issued for the purposes of paying tax and receiving social  security benefits.