Quote Originally Posted by k9krazee
Instead of a milk replacer, I'd recommend a homemade formula if you can. It has more calories than the milk replacer, here's the recipe we used on Kyra when she was a baby.

10 oz of canned evaporated milk or goat's milk
3 oz. sterilized water (baby water or boiled water) this is not needed if using goat's milk
1 raw egg yolk
1 Tablespoon of regular mayonnaise (optional)
1 cup of whole plain yougurt (avoid skim or fat free)
1/2 tsp of corn syrup

Just an idea. Good luck!!
I probably wouldn't add any corn syrup, especially seeing as you don't know the species. Anything sugary, especially for something so young & tiny can cause major problems in many of the animals in the mustalid family (ferrets, mink, etc...) I would also avoid mayo.

If you can get goats milk that would be great, you can feed just that alone. I wouldn't add anything else to it until he starts eating better, you want something thin (not may or raw egg, could cause choking problems).