Esbilac puppy milk replacer is a good milk replacer for baby squirrels. Never feed a baby squirrel cow's milk, Evaporated milk, goats milk or any homemade formula. It is very important in the growth and health of your squirrel to feed it the proper milk. Esbilac milk replacer is a powder you mix with water. 28 oz can. Esbilac puppy milk replacer is also good for opossums, beavers,chipmunks & ferrets.