It's tough to find Delawares with deep chests. It's best if you start with non-hatchery birds that already have the deeper chests, and then evaluate your breeders very carefully so they don't lose the deep chest. Longer keels (should extend well beyond the legs) helps with good breast meat distribution. Longer keels I think also help with wider spread tails. I'd say most hatchery Delawares lack width across their back at the base of their tails, so you get the more triangular birds. I'm just not convinced you can ever get there starting with the more "refined" hatchery birds. Getting started with some good sturdy birds is essential, and these days it's also possible.
You'll see a chesty bowl shape on even the very young cockerels ... though the good ones need a while to build up their bone structure early so there might not be a lot of meat on the frame until they're a bit older. But the shape will be there.
If you get the right shape, you'll get some nice meat.
