I am confused now. I have read in a lot of places and posts that feeding boiled egg yolk doesn't require grit. It was just a crumbled boiled egg yolk a day mixed in to feed all the 18 chicks, half yolk in the morning and half in the evening for ALL chicks. It said it was OK to give egg yolk even in my hatchery instructions, and it didn't mention grit.
About the wet chick starter I asked in several posts and thought it was OK to give. I even know several people fermenting the chick starter and giving it wet. My hatchery's instructions also mentioned moistening the food, but only if the chicks arrived stressed. I was feeding it because I had a weak chick, but since all chicks were crazy for it, I gave it to all.
After reading about benefits of fermented food, I have started a batch of fermented chick starter, should I avoid giving it then? Can it cause impacted crop too? If my chick died from impacted crop wouldn't I have noticed swelling? I saw pictures of chicks with impacted crops and the swelling was pretty noticeable.Also, wouldn't all chicks have been affected? I would hate it if I caused harm to this poor chick!
In my opinion, dampening the food will not cause impacted crop. I myself have done it when the chicks get to an age and seem bored with their crumbles. It's also good way to make use of the powder that collects in the bottoms of feeders. Most of the chickens love it. I use a teaspoon of organic apple cider vinegar in half gallon water and use that to mix. I have never lost a chick or a full grown bird to an impacted crop because of a wet mash, and it's been years of raising them. It is always a different reason like hay or grass or feathers, and those reasons were eliminated as I learned. Now, what may be happening, and what the poster may be warning against is sour crop. I think wet mash (especially mash that had protein like yolk) that sits out too long in warm weather can breed some harmful bacteria or yeast and maybe cause a sour crop, which is a bit different than an impacted crop, but you still can lose a bird. So, when feeding wet mashes, and the weather is warm, you want to make sure you don't leave it setting out overnight for the next day.
Honestly, I don't think it was that either because you said the chicks cleaned it up pretty quick. I just think something else killed that chick, hereditary, or disease related. Some diseases are passed through the egg and manifest in the 1st, 2nd, or 3rd week of life. The other chicks may or may not be affected.
As far as pine shavings go, don't worry about them picking up a small piece and running around with it. They all do that. The scratching is quite normal and healthy and it's what chickens do. Just use the big flakes if you can find them, not the finely shredded stuff, and provide chick grit for them. I sprinkle the grit around the floor for them, that way when they are scratching and searching, they find some grit along with their "prize" they think they have. Or put a few little piles here and there in the brooder. They always seem to dive right into that grit. So I do that a few times a week for them. That grit will take care of any shavings they may consume. Even full grown chickens will eat those small pieces of shavings. I don't know why. One breeder told me don't worry about it, it's fiber for them and as long as they have grit they will be fine. And they were.