I agree with @catwoman707.
I wash each of their bottles separately every time I fill them. I just have the 2 being bottle fed, the rest of the siblings are with a mom, these 2 were just not doing well so I was taking them home with me at night and putting them with mom during the day and supplement feeding, until the little one decided not to eat very good after being with mom but wasn't doing well.
I would wash the bottles thoroughly in case it is contagious. You don't want to reinfect them.
She is doing good. Eating really good, no poops since last night, still peeing on herself thoughHow is the little one doing now?
She is eating about 12-15ml every 2 & 1/2 to 3 hours. I am stimulating with a cotton ball, seems to work better than a towel or paper towel. I think we finally got her over the diarrhea slump, as her stools are firming up. She gained almost an entire oz this morningHow much formula is she eating and how often? It's good she's peeing. It may take a couple days for her to poop. Is mom stimulating her or are you?