DS was bottle fed from 3 days old - lost the weight no problem, plus a little more.

DD was bottle fed from birth - am losing weight now.

I don't really believe that BFing helps lose weight for all women - doesn't seem to work for any of the women in my family!!!

As for guilt.... I don't feel any guilt - but saying that - will make an effort to BF #3 as that will be my last child and I will be a SAHM then.