Personally I want to be sure they are hydrated first. Shipped chicks are often beginning to become a bit dehydrated. So we get them out of the shipping box and put them in the brooder, and 9 times out 10 want to make sure that they get something to eat first thing. So dry chick eating dry food? Ever been thirsty and eat a soda cracker? Yeah, like that. Could be my imagination, but I don't really care.

Water first is what I prefer. And to be sure they get both, simply wet the food into a mash and put it down in a small jar lid or something that won't wick the water out of the food. It's easier for them to eat anyway because it's mashed so it's smaller. And wetter!
I don't put additives in their water. If they are healthy, that means that all of their immature digestive systems are in balance, so I don't see any point in giving them anything that could throw that balance off. If I have any suffering hatching or shipping stress, they get a shot of Nutri-drench directly. I put it on a Q-tip (because that stuff is MESSY) and put it against their beaks. When they open their little mouth to cheep, the Q-tip goes in and so does the Nutri-drench. I received an order of 15 Silkie chicks one time, and every one of them was suffering from severe shipping stress. That was the only time the entire waterer contained Nutri-drench, but I made sure they still had clean, fresh water available at the same time, and that was just for a couple of days, not for long term use.
I don't do medicated food either. When they are a couple of days old I toss a clump of sod out of the garden - roots, grasses, weeds, little bugs and all - into the brooder to give them an early exposure to what they'll be living on out there. If a mother hen was raising them, she'd have them out pecking in the dirt when they are just a couple of days old too. And I do that even though I raise my chicks outdoors in the run.
Good luck with your new adventure. And welcome to BYC!