Also had a badly jaundiced sleepy baby who needed two (or three?) days under lights. Had loads of support at the hospital getting him latched on, but he did have a big initial weight drop. Fortunately he was large baby to start with. Was given some EBM in hospital from a cup.
He didn't gain wieght for ages, so I was advised by the breast feeding advisor at the hosptial (where I was still attedning a b/f support group) to feed him two hourly and to wake him to do so. Eventually (after two weeks) they loaned be an electric expressor and for a while every second feed was expressed - but he never seemed to suffer from nipple confusion. I did have to learn a particular way of "posting " my boob into his mouth, to get him to ltach on (he was a lazy wee tyke who learnt to pretend to suck in order to stop the hassle of tickled feet, clod water on cotton wools stroking cheeks, soles of feet, cold water being dripped into ears... to keep him awake and alert enough to feed)
I did know someone in the group who ended up feeding her ds for 6 months through nipple shileds as that was the only way that he would latch on.
Interestingly, the bf counsellor said it was almost always boys who were so awkward!
For the record, eventually I stopped bothering weighing ds, who was happy, healthy and alert and I went on to feed him for a full year. I kept the epxressing going (with a Ameda hand pump) as I was going back to work when ds was 4 months old and it was useful to keep ds used to bottles of EBM and build up a supply in the freezer.
He is now a happy, healthy and alert 4.5 year old! Somewhere about average I think - but that's only by looking at him compared to others. I know he weights 2 stone 12.5 pounds, but haven't converted that to kilos to put into his red book. Really can't be bothered