Exactly. There just isn't a good reason not to. It's so easy to do and then it's there if they need it. Imagine trying to expel a rubbery egg that gets stuck and just won't move and how uncomfortable that is vs. one that's smooth and slides on through. Waiting for that to happen before...
I'm on the other side of this from most thus far. A rubbery egg can be murder to expel and a thin shelled egg can break internally - first time could have serious consequences - so I say, better safe than sorry. It's so easy to have oyster shell available at all times - a bag lasts a long...