I had put them in the bathtub until they're 7 days old, unless they've come straight from a store and I have a place to put them ready in the enclosure (I'd been moving around a lot the past few years). Now, I'm considering taking them straight from the post office into the coop, which is empty now, except for my heat lamp and baby monitor and outdoor temperature sensor. If I fail to get the temps reasonably stabilized by this Thursday, I'll move the heat lamp inside and fall back on the bathtub plan. It is a pain to clean up, but not bad at all if the babies are only in it for 5 days vs two weeks. Just a matter of the high afternoon temperatures approaching 100 F, and night time lows around 60-65 F, but I do have a decent timer on the brooder bulb so that's been helping me get the temps stabilized.