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Ah, Blue Plymouth Rocks, possibly my least favorite of the hybrid names. There is literally a Blue Plymouth Rock, a true breed, that exists, yet we've chosen to call an Australorp x Barred Rock mix the same thing. :rolleyes: Gotta love hatcheries.

They are kind of the same thing as Sapphire Gems in that they're both a blue sexlink cross. I believe Sapphire Gems have Andalusians as the blue parent, while the Plymouth Blues have Australorps as the blue parent, but they both have Barred Rocks as the mother to produce a sexlinked cross. I would expect the Plymouth Blues to be a bit huskier than the Sapphire Gems just because of the parent breeds, but it's hard to see that difference until they're at full maturity.

As for your bird in question, can you get a closer, clearer picture of her? Does she have the same kind of comb as the others? She is blue from what I can see here, just a darker shade of it. Blue kind of exists on a spectrum, where you can have a pale individual and a dark individual out of the same breed, even out of the same parents sometimes, so her being darker doesn't necessarily mean she's something else.

At the same time, there are a few other things she could be, like a Blue Australorp or Blue Andalusian, themselves, instead of a hybrid of those breeds. And TSC is notorious for mix-ups with their chick bins! A clearer picture will help me to determine what the possibilities are, here.

Editing, huh, I had a feeling I recognized these names and looked back--Midnight definitely looked black back in May, but this picture makes her look blue. 馃 Definitely need a better picture!
 

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Okay, so she is actually blue! Wow, she was so dark when she was younger!!

Are her legs like the others', greenish-gray with yellow on the bottom? I'm starting to think that she's just a darker Plymouth Blue / Sapphire Gem. Blue Jersey Giant is another possibility, though, with yellow skin on the feet. Unfortunately, it would be almost impossible to be sure of which she is out of those possibilities, unless she ends up being much larger than the others (in which case that would be Jersey Giant territory). I don't see anything else from the hatcheries TSC typically order through that would match her appearance. She's an interesting one for sure!
 

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Haha, it happens sometimes! I think we do have her narrowed down to the only possibilities now; either a Sapphire Gem / Plymouth Blue or a Blue Jersey Giant, since nothing else would have the yellow on the feet like that. You may not have a definitive answer for a few more months, though, as the way she grows and fills out will be the most telling between those possibilities.
 
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