I put mine into the bathtub from day 3 on. I have a nice fiberglass tub that is slanted and has a textured floor in it. Works really great for my ducklings. I fill it up with warm water so that is is about 2 inches deep on the shallow end and 4 on the deep end. Make sure they can stand in one part of the tub. Then I sit on the toilet seat and watch them having fun. They are done when they stop splashing and just stand around. At that point I drain the water and make sure nobody gets near the drain. I put the plug back into the drain and leave them in the tub and close the door to keep the dogs out. That gives them about 5 minutes to start preening. They do not have the oil yet, but they learn the motion and how to get water out of their feathers. Now I clean out the brooder and get it ready for them to get back in. I go back to the bathroom, towel dry each duckling, and return them back to the brooder. They gobble up food and sit under the lamp falling asleep a couple minutes later.