Three of the children were seized and two of them received transfusions before being returned to the family. The father is now suing the government for infringing on his religious freedoms, and to block any further seizures.

Sextuplet parents take B.C. to court over baby seizures

Details as to why they received transfusions are not available (patient privacy and all that), so it's not clear if they had surgury and needed blood, or if their condition required a blood transfusion. Either way, most of the treatments listed on NoBlood.org wouldn't help, since they are mostly "remove blood & store for later re-insertion", which wouldn't really help a newborn...

According to an affidavit the father submitted, one child had a Hemoglobin count of 88g/L one day, and 80g/L the next (normal human is 120-180g/L). So they had 5 possible treatments:

-increase iron intake (unlikely to help, as he Hb level was falling too fast, treatment takes weeks)
-correct blood loss (n/a, they weren't bleeding out)
-medication such as Erythropoietin to stimulate blood production (unlikely to help, see iron intake)
-blood transfusion
-bone marrow transplant (would require anti-rejection drugs, and would involve blood transfer anyway)