I BF DD exclusively for about 4 months. 3 weeks ago I started supplementing with formula during the day and BF in the morning, late afternoon & evening to get her used to it for when I return to work in a few weeks. She took to the formula in a bottle pretty well, but all of a sudden, she's rejecting it. I've tried two different nipples (size 2 & 3) with Similac powder formula. She used to suck it down but now she fusses and sticks her tongue out & spits out the formula. She will not eat it.

How do I get her to take the formula from a bottle again? If I offer her the breast, she'll take it immediately. But I need her to take the bottle during the day. I have to wean her & myself so I can return to work.