I usually start them on this at 4 weeks old as a very thin liquid and gradually decrease water week by week until by 10 weeks it is the consistency of canned dog food. I also start offering dry high quality ferret food at 6 weeks and gradually Increase the amount of kibble while decreasing the amount of mush until they are fully weaned. We always nuke it for them to the temperature of baby formula. We have tried increasing the amount of dry food, but if it gets too thick some of them won't eat it. This formula also freezes well the Sustacal must be used within 48 hours if left only in the fridge.
Goats milk more for flavor and because it contains less bacteria than cows milk.
I get it fresh as needed and pasteurized. This recipe is based on the one in the Ferret FAQ, but there are good comments on serving, storage, and the response of the ferret included at the bottom. 1 can water 4 oz. Makes eleven 2 ounce servings. After the first week Fancy responded so well and gained weight so quickly that the baby food was omitted.