What to you feed newborn mink kits?

You might try a kitten or puppy milk substitute with ingredients close to 25% protein, 34% fat and 16% carbohydrate. Or from the book by James McKay "Complete Guide to Ferrets" ISBN 1-85310-433-7, he has raised ferrets (which are similar to minks) a mixture of evaporated milk and water (1:2), mixed with the yolk of an egg..