One more question though...has anyone used Esbilac Milk Replacement? Also if y'all could see the attachment, I found the Ready-to-Feed version and the nipple is a little bit smaller than Koko's nipples. Will this work as a nurser? Has anyone tried this?

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That nipple will be fine. After about 2 1/2 weeks I used a Gerber newborn nipple on that bottle and it worked really well with the pups. The smaller nipple they kept rejecting. I tried almost every nipple out there too

I used the Just Born formula though. Petco sells it. My vet said the protein in the just born is better than the Esbilac but I know different things work for different people. If you need something that you dont have in Hawaii let me know I will be there next week and I could bring it down.