Hi GotCoop! Yeah, this has been a new thing for us, so don't have any deep analysis of anything other than taste & tenderness. Our birds last year were straight run of :
SG Dorkings
Partridge Chanteclers
Dominiques
Barred Rock
Cuckoo Marans
Golden Laced Wyandottes
Speckled Sussex
These were all hatchery stock. I imagine better quality stock would have better outcomes. All were harvested at 19 weeks of age. All aged 3 days in fridge before being vacuum sealed & frozen. That being said, my favorite was the Golden Laced Wyandotte. Good sized birds with good flavour, and just a bit of bite to the dark meat. A pleasurable eating experience. The Barred Rock cockerel (hatchery error) was biggest bird, but tough in the dark meat. Dorkings were good size, but found meat dry and not as flavourful. We kept the Marans aside for breeding purposes. The rest of the birds were on the small side, but most flavourful & tenderest of those were the Chanteclers & Dominiques.
This year's panel will consist of :
White Chantecler
Dark Cornish
Black Australorp
Ameraucana (Easter Eggers I imagine)
Columbian Wyandotte
Buff Orpington
White Rock
I will be incorporating fermented feed with this batch of chicks. I may keep the Chanteclers aside as my future egg layers.