You may already know this on the baby squirrels but.
NEVER, NEVER, NEVER FEED COW'S MILK, WHIPPING CREAM, WALMART FORMULA BRANDS, EVAPORATED MILK OR HUMAN INFANT FORMULA TO A SQUIRREL!
These contain WAY too much lactose for squirrels, and have only a 4% to 6% fat content.
Squirrels require 30% to 40% fat content in their diet!
The ABSOLUTE BEST choices of formula for infant squirrels are
Esbilac or
GOAT'S MILK ESBILAC. These are puppy’s milk replacers, and closely resemble the components
of squirrel's mother's milk. They are made by Pet-Ag and available at Pets-Mart, PetCo and Tractor Supply. Some Vet offices keep a supply on hand. UPCO usually has the best price if you order online
www.upco.com or phone/mail order at (800) 254-8726.
1- 12 oz can of the powder should be enough to raise 1 squirrel to weaning age. The mixing ratio is 3 to 1; 1 part formula powder to 3 parts water. Formula is only good for 72 hours after it is reconstituted or mixed, then the vitamin and minerals will begin to evaporate, so mix small amounts accordingly.
http://www.arcforwildlife.com/squirrels.htm