bottles

Brooke
My daughter is 8 month as of yesterday. She has been bottle fed since day 1 because she wouldn't latch, but around 3 months we tried breastfeeding again and she latched! 
Well now for some reason she won't take a bottle, the same bottle she's always had. I've tried changing the nipple flow and another kind of bottle. 
Thought it might be from being congested but she still nurses like a champ. 
Any ideas what to do?! I need her to eat when she's at daycare, just like she used to!