I know many believe in it, and haven't had any problems, but I personnaly don't like giving one species' milk to another... unless it is cow's or goat's milk for me and my family.
Isn't that a contradiction in terms????
Goat milk is known as the 'universal milk replacer', you can raise everything from rabbits to puppies to human babies on it because it is so easy to digest.
Homogenized Vitamin D cow milk is very easy for goats to digest, and when I don't have enough goat milk to go around for the 30-50 kids a year we have born here, that's what I use.
Most of the goat replacers I've heard of people having good luck with (Land O Lakes is one I've heard good things about) are costly, compared to the 'cheap' multi-species replacers.
I buy Vitamin D milk on sale and stock up / freeze it.
There are many different types of nipples, I like the Caprine nipple for standard-sized kids. Bigger kids seem to get frustrated w/ the smaller Pritchard nipples when I've tried them in the past.
http://www.caprinesupply.com/shop/?page=shop/browse&category_id=db9d71081f12517fbc1005d34c750991
They just pop onto a 20-oz pop bottle.
We feed all babies 3x a day....from birth on. 8am, 2pm, and 9pm.
At 2 mos we go to 2 bottles a day, then at 10 weeks, 1 bottle a day...wean at 3mos.