What can I do to get her to take a dummy?
There's loads you can do!
Firstly, my breastfed babies were better with cherry teat dummies, the rounded bulbous ones. They fill the mouth more, like the breast does.
Next, are you giving baby the dummy in the right way? Much like you don't just shove nipple in baby's mouth and hope for the best, you also need to give similar thought you dummy placement to get baby actively sucking.
Baby should reach with mouth you take the dummy. Try tickling upper lip or cheek with the teat do baby turns to get it. Don't just put it in the mouth, baby needs to actively engaged in getting the dummy.
Once baby has reached for dummy with her mouth, put dummy in pointing it upwards and backwards - so towards the roof of the mouth. This is so so mimicking breastfeeding.
Next if you get it in baby's mouth, you want baby to be actively sucking it at all times. It serves no purpose sitting limply in the jaw. To do this tap gently on the outside of the dummy, it encourages the sucking reflex.
If baby isnt sucking or cries with dummy in, remove it and start again getting baby actively reaching to take it. Taking the dummy needs you be an active process, not something passively done to the baby.
Try giving the dummy at various different points of tiredness. Try when awake and alert rather than when exhausted and grumpy.
Try immediately after a feed. Whip nipple out and dummy in.
Try rocking baby in your arms while giving dummy.
Try holding baby in breast feeding position to give dummy.
Try someone else (who isn't associated with breast feeding) doing all of the above.
Above all else - keep trying. Dummies are amazing. Worth their weight in gold for independant sleeping.