Problem bottle feeding one of the twins

Hi there,

We have twins who are 3 months old (1.5 months corrected) that my wife
is currently breastfeeding. Occasionally I bottlefeed one of them to
give her a break but our problem is with the other one (Hannah) who
has problems with the bottle.

Hannah will start to take the bottle fine but after several minutes
she will try and spit the nipple out, start crying, arching,
stretching and looks to be in a lot of pain. If I try and continue,
it's as if she can no longer get a good latch on the bottle nipple.
If I do get it above her tongue she will try to suck but quickly
fights it off or sucks but it most seems to spray out of the side her
mouth or leak out.

We've tried all manner of nipples (using different brands, flows,
shapes and textures) but can't find anything that works. She
definitely has reflux and is on Previcid for it. Putting her on it
has allowed my wife to nurse her where before she would not even nurse
very well. Nursing still isn't perfect with her as she sometimes will
take very little but she must make up for it at other times as she's
gaining good weight consistently.

Any ideas would be most appreciated.

Thanks.