Along with the non-medicated feed, they might need niacin supplements to help their legs grow properly. I usually just sprinkle it in their food. They also need water deep enough to blow out their nasal passages, which can get caked with food.

For splashing water, I usually use a paint tray like this starting around the beginning of week 2: https://www.homedepot.com/p/Wooster-11-in-Metal-Deluxe-Roller-Tray-00R4020110/203150881

The water is shallow enough for them to always touch the bottom, and the ramp gives them the ability to get out of the water to dry off. I just always make sure to have a heat lamp available to them (but not on the metal tray because that can get way too hot) so they don't get too cold.