My little guy was latching great on both until my "real milk" came in a couple days ago. My boobs were so large and he would latch on the right still but not the left due to the size and that my nipple wouldnt pop out as much. I freaked out and posted in a moms group im on in facebook and one of the women is a lact consultant... She said get him off the shield asap for he could get to used to it and pump the left boob every 2 hours. So i did that a few times and the boob was still pretty large compared to the right he was feeding from. He will latch on the left with the nipple shield and now am avoiding her instructions. I'd rather feed from both and use the shield only on the left. I dont want to give up on BF but will if i have to pump every 2 hours for one and feed from the other every 3

is my plan to shield one and not the other ok?? Thanks!!!
Re: Nipple shield on one boob - good or bad?
I had the exact same thing happen to me when I became engorged and this is what my LC had me do - hot pack or warm washcloth before feeding to get milk and blood flowing, pump for a few minutes to pull the nipple out, feed baby without the shield so they remove more milk, cold pack after feeding to help with swelling, rinse and repeat every two hours for 24 hours. I also wore gel pads between feedings and used lots of lanolin when I pumped.
One day of doing that and my engorgement was gone and my breasts were back to normal and baby was able to latch without the shield. I had been so ridiculously rock hard and engorged I couldn't feed without the shield either. It was a pain in the butt 24 hours, but better to deal with extra work for one day than to need to use a shield full time for months (I had to use one for the first 5 months feeding my first daughter and hated it).
That said, I used it with DD1 longer than my LC recommended, and though weaning from it was a pain, she breastfed fine after that and my supply didn't suffer too much, so at the end of the day, do what you need to do.
The shield is a very helpful tool, but definitely a pain in the butt to use long term, I'm glad you don't need it anymore!