​Popularly known as "Kitty Glop", it is packed with nutrition for orphaned kittens, nursing mother cats and their babies, cats recuperating from illness and older cats who need nutritional supplementing or who have difficulty eating because of dental or gum problems.

Some recipes call for canned goats milk; if you have it readily available it's fine, otherwise canned evaporated cows milkworks well.  The recipe sets up to a gelatin-like consistency in the refrigerator, and can be stored there for up to two weeks.  It can also be frozen in an ice tray for convenience in serving.  To serve, warm to room temperature.  Do no pour back unused portions into the mix.

12oz of water
1 envelope Knox Gelatin
1 12oz can of whole evaporated milk (not skim)
2 tablespoons mayonnaise
2 tablespoons plain yogurt, not nonfat

Boil the water, add the gelatin - stir well.  Add the following ingredients in order, mixing well after each addition:

1/2 of the canned milk
mayonnaise and yogurt
the rest of the milk

Variations include the addition of kitty vitamins, acidophilus
and/or pureed baby food meat such as lamb, chicken, or beef.  You can use a blender or wire whisk.
East Contra Costa County
Homeless Animals Lifeline Organization

The below article came from About.com/Cats