Tracey does warn that some very stubborn older babies can take 3-5 days to take milk from a bottle, but the majority will take less than 24 hrs.
I did do a cold turkey to bottle with Jacob at 6 mths - but I did use a different technique which was to try in 12 hr stretches and then BF overnight. He took the bottle at the end of the second day - but I used EBM and then diluted onto formula.
So that is another option for others trying to wean from breast - to get onto EBM first and then just slowly dilute onto the formula - I appreciate that this would not have been a feasible option for you though since one of your reasons for weaning is low supply and pregancy.
I do agree with trying a non-silicone teat - MAM silk teats worked here.
I'm very glad that your LO is taking something now though - they do say with LO's on solids that you should continue the solids and sips of water through the transition.
I wish I had seen your post earlier - but I think on of the hardest things about this sort of situation (especially with older babies) is that different things work for different babies. So a lot of the things you recommend were a no-no here - he HATED premade formula, didn't like the sweeter ones either (in the end he settled on one of the bog standard ones), and still to this day will only have milk from me really. So despite being on a bottle since he was 7 mths old milk still comes from Mummy
.
So I guess it is a good thing I missed your post as I would have been no help at all.
But just wanted to say I am really relieved to here that your LO is doing better now, as I was worried about dehydration etc as well, and just wanted to post a few extra points for any other Mums who are doing a breast to bottle wean
.
And Brocks Mummy - hope your LO settles back to his bottles soon. Teething seems to cause some VERY unpredictable teething behaviour.
((hugs))