If you had one that was easier to burp I think if I had to choose I would go with the easier burper and then go to the other one...Tristan was always so difficult to burp I would dread it...mind you I also nursed one and then burped and then re-did the routine with the other one.
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You could alternate a bit. I would start feeding one a few minutes ahead. And then burp the other for the first time when you begin feeding the other. Burp one over your lap. You could also burp two over your lap.
I feed at the same time as well. I have one that is pretty easy to burp so I start her a couple minutes before the other. I usually am able to burp her before her sister is finished eating.
Re: i got the feeding two down, now its the burping two that is killing me!