In the poultry world chickens are usually classified under 4 groups: Layer, Dual Purpose, Ornamentals, and Meat Birds.
Laying birds are good layers, buy are not necessarily good for meat, they are usually slim. Some examples are: Ameraucana, Lakenvelder, Campine, Hamburg, Pendesca, Leghorns, and Andalusian.
Dual Purpose are good layers and meaty enough to eat. Some examples: RIR, Plymouth Rock, Orphington, and Jersey Giant
Ornamentals are sometimes good layers, but are usually rarer breeds, fairly new to the US, or just really cool to look at. Some examples: d'Uccle, d'Anver, Naked Necks, La Fleche, Buttercup, Polish, and Silkie
Meat birds are sometimes good layers, but are usually bred to be very large and meaty. Some examples are: Cornish, Cornish X (used by most major corps for meat, a cross with Plymouth Rock I think), New Hampshire, and Brahma
Those are just the basics, but you could classify Naked Necks under Layers, or even Dual Purpose. Hope that helps!
