A small Japanese quail GWAS identifies genetic regions associated with egg weight and shell, albumen, and yolk traits—useful research leads, not a ready-to-use breeding test.

Summer losses are not always mysterious. Heat can quietly reduce feed intake, laying, shell quality, fertility, immunity, and growth before birds reach crisis.

Panting is the part of heat stress you can see. This review explains the hidden costs inside the chicken, from acid-base imbalance to gut-barrier disruption.