Thanks for all your replies ladies

Still not sure what I'm going to do. I think it's more that I feel I 'should' try without the nipple shield, but also don't see the point when everything is going so well with them. TBH, even the thought of trying without stresses me cause it upsets DS so much. I feel kind of like 'if it ain't broke don't fix it'. We have a check-up next week, so I might talk to the child health nurse about it then.

Thanks again for your replies. Knowing the options, and also hearing others successful long term use of NS helps .