Silver Laced Wyandotte was in their "Standard Package" and I got one of those. I might have black Australorps too.
I was just wondering if that has happened to anyone else. Maybe they're not Australorps but look similar right now as chicks.
I'm looking through the list here:
https://hoovershatchery.com/hatcherychoicerare.html
And comparing with photos here:
https://hoovershatchery.com/id-my-chick.html
"Rare" chicks that could look like Black Australorp to me:
--Midnight Majesty Marans
--black "Blue Andalusian" (breeding blues gives black/blue/splash, so black chicks are common.)
--French Black Copper Marans (might have feathered feet)
--maybe Cuckoo Marans or French Cuckoo Marans (barred chicks "should" have yellow dots on their heads, but somtimes they're quite small or faint, and the chicks look remarkably like black chicks)
For the Silver Laced Wyandotte: could it be a Columbian Wyandotte? That's on their rare list.
Other chicks that might resemble Silver Laced Wyandottes in color, although they all have different comb types:
--Silver Lakenvelder
--Blue Andalusian (black, blue, splash: at least some could look similar)
--Light Brahma (has feathered feet, but similar at first glance)
The rare list also includes Sapphire Olive Egger, Prairie Bluebell Egger, Starlight Green Egger, Olive Egger. Those are all crosses of one kind or another, and some can come in quite a few different colors, so that makes them the hardest to identify (but if you want colored eggs, they are very nice ones to have!)