My DS lost 11 per cent and didn't get back to birthweight until day 27, by which point we'd been sent back to hospital twice.
We only got to birthweight in the end with formula top-ups. I tore myself to bits over this at the time, and wept while buying the Aptamil in Boots. The sales assistant must have thought I was a nutcase.
But, in the end, I'm really glad we did it. Topping up with EBM wasn't working for us as my supply wasn't up to it. I think this was due to a combination of a horrendous birth and virtually no bfing support on the postnatal ward.
But, once I caved at around three weeks and gave the formula top ups, DS became stronger - and more awake! - packed on the weight and learned to breastfeed.
My supply then caught up, we dropped the formula top ups and now, at eight months, we're still breastfeeding.
The reason I'm saying this is, if everything else fails (tickling feet, skin to skin, spending days in bed, EBM top ups etc) and you do have to give formula, don't worry. It's not the end of exclusive breastfeeding, and it may indeed be the key to you and your DD sussing breastfeeding together.
Apatchylass hits the nail on the head when she says: "We're there to help our babies, not pin our belief systems on them from birth." I was in an absolute tizz over giving DS formula. I felt I'd failed. I wish the me from the future, with a healthy and fully breastfed DS, could have gone back in time to comfort myself seven months ago, when I was hysterical over a bloody carton of formula.
Good luck.