Well know essential is the Lifeline kit for kittens.

Containing Nutridrops 30ml and 100g jar of colostrum.

A must have for your kittening kit incase of any problems with either young kittens or thier mother during or after the birth.

Cat breeder nutri-drops-30ml ;

A high energy, nutrient rich, liquid concentrate, containing only quality nutritional ingredients proven safe and effective. NUTRI-DROPS FOR CATS is an immediate source of glucose, B vitamins, amino acids, vitamins A, D & E and trace minerals, NUTRI-DROPS are indicated in any condition where additional energy and nutrients are needed to support normal metabolic function and normal immune system activity. NUTRI-DROPS also aids to insure newborn kittens start out strong and nurse vigorously, aids in stimulating the appetite, saving chilled and stressed kittens.

Administer: Newborn - 0.1 ml per 3.2oz (90gm) body weight. Critical Aid - 1 ml per 31b (1.36kg) bodyweight. Slow Kittening Queen - 0.5ml per 5lb (2.25kg) bodyweight.

First Life kitten colostrum-100g ; 

For orphan kittens or young animals whose mothers are furnishing inadequate or insufficient colostrum. Complete nutrition and protection package scientifically formulated with protein, vitamins and minerals, especially for newborn or orphan kittens.

Administer for newborn kittens: Mix one scoop (10g) to 20ml of warm water. Feed 12cc (1 tablespoon) of mixture per 55g (2oz) body weight every 2 hours. Continue to day 3 then revert to milk replacer if kitten is strong, active and healthy. If in doubt, continue regime until satisfied.