Two placentas is not typical was it long and stringy and hanging? I am glad she has passed the placenta though. I have not had that big of a size difference but was told it is not typical with twins. You usually see it with 3 or more. It depends on how weak she is but it sounds like she is going to be ok. The BOSE is usually given to weak kids because this indicates a selineum deficientcy and will make her stronger faster. If you can not get BOSE from the vet there is a gel you can buy some TSC's sell it but ours does not. I have to order it. Sometimes one kid will take all the nutrients and the other does not get much. I had one born weak and a little bow legged. She bounced back and was healthy and strong after about one month.